The 70% Rule: A New Mandate for Brands

Here is a number that should terrify every brand manager still treating social purpose as a checkbox exercise: 70%.

That is the consumer appeal score researchers at the NYU Stern Center for Sustainable Business recorded when brands layered three authentic social sustainability claims onto their core product messaging. The baseline — a well-crafted product pitch with zero social context — sat at 42%. One relevant social claim pushed it to 62%. Three pushed it to 70%. The study, backed by Edelman and the Ford Foundation, tested seven major U.S. brands across demographic and attitudinal segments. The pattern held firm.

This is not a feel-good stat for your next ESG report. This is a performance gap. A nearly 67% lift in appeal simply by telling consumers something true about what your brand stands for beyond the product itself. And yet, most brands still treat purpose messaging like an afterthought — a paragraph buried on the "About Us" page, a once-a-year social media post during a culturally approved awareness month, a CSR report nobody reads.

The data says that approach is leaving money on the table. Lots of it.

Why Product-Only Messaging Has Hit a Ceiling

The 42% baseline is the part of the study that should alarm you most. It means that purely functional messaging — features, benefits, specifications — appeals to fewer than half of consumers. Not because the products are bad, but because the messaging is incomplete.

Think about how consumers actually make decisions in 2026. They are flooded with options. In almost every category, product quality has converged. Your competitor has a similar feature set at a similar price point. The rational differentiators that worked in 2010 are table stakes now. When everything performs roughly the same, the decision shifts to meaning. Consumers start asking: "Why should I choose you over the other five brands that do exactly what you do?"

Product-only messaging cannot answer that question. It speaks to the logical brain, which has already been overwhelmed by comparison shopping, review fatigue, and option paralysis. Purpose-aligned messaging speaks to identity. It answers a different question entirely: "What does buying from you say about me?"

At Aragil, we have seen this pattern across hundreds of campaign audits. The brands consistently outperforming their category are the ones whose messaging creates an identity bridge between the product and the buyer\u0027s sense of self. Not through slogans, but through specificity. Through claims they can actually back up.

The Authenticity Filter Is Brutal — and That Is Good News

Here is where most brands fail, and where the opportunity lives for the ones willing to do real work.

The NYU Stern study found that the 70% lift only materializes when social claims are credibly linked to the brand\u0027s core business. Generic purpose statements — the kind produced by agencies who paste "making the world a better place" across a hero banner — generate no meaningful lift. In some cases, they actively damage appeal by triggering consumer skepticism.

This is the authenticity filter, and it is merciless. Consumers have been burned by performative purpose so many times that they have developed what amounts to a sixth sense for it. The rainbow logo in June from a company that donates to anti-LGBTQ+ politicians. The sustainability pledge from a fast-fashion brand that has not changed its supply chain. The diversity commitment from a leadership team that looks exactly like it did a decade ago.

These moves do not just fail. They generate active hostility. They become content for takedown threads, screenshot compilations, and brand-critical TikToks that accumulate millions of views. The cost of inauthenticity is no longer silence — it is viral ridicule.

But here is the flip side: because most brands are doing purpose badly, doing it well creates enormous competitive distance. The bar is low. A brand that can point to specific, verifiable actions tied directly to its core business operations stands out immediately. Not because the claim is flashy, but because it is real.

The Three-Claim Architecture

The study\u0027s most actionable insight is the escalating return from stacking multiple social claims. One claim lifts appeal from 42% to 62%. Two claims push it further. Three claims hit 70%. This is not a linear relationship — the first claim does the heaviest lifting, and each subsequent claim adds incremental but meaningful gains.

What does this mean practically? It means brands need a layered purpose architecture, not a single talking point. Here is how to think about it:

Claim One: The Core Link. This is the social claim most directly connected to your primary business activity. If you sell food, this might be sourcing transparency. If you sell technology, this might be digital accessibility or data ethics. This claim should feel almost obvious — so tightly connected to what you do that consumers think, "Of course they care about this."

Claim Two: The Operational Proof. This extends the purpose into how you operate. Supply chain practices, employee treatment, environmental footprint of your production process. This claim moves from "what we believe" to "what we actually do differently." It requires specificity — percentages, third-party certifications, measurable commitments with timelines.

Claim Three: The Community Impact. This connects your brand to outcomes beyond the transaction. It might be educational initiatives, community investment, or systemic advocacy within your industry. This claim answers: "What has changed in the world because this brand exists?"

The architecture works because each layer reinforces the others. The core link establishes relevance. The operational proof establishes credibility. The community impact establishes significance. Together, they create a purpose narrative that is both compelling and defensible.

For Three of Seven Brands, Purpose Beat Product Entirely

This finding deserves its own section because of how radical it is. For three of the seven brands tested, a social sustainability claim was the single highest-performing message — outperforming every purely product-focused pitch in the study.

Let that recalibrate your mental model. We are not talking about purpose messaging performing "almost as well" as product messaging. We are talking about it winning outright. In a direct comparison, consumers found the social claim more appealing than the best product claim the brand could muster.

This does not mean product messaging is dead. It means product messaging alone is increasingly insufficient. The brands where purpose outperformed product were the ones where the social claim was deeply authentic and directly relevant. The message felt like a natural extension of the brand, not a bolt-on.

The implication for media planning is significant. If your purpose story is strong enough, it should not be quarantined to organic social media or the CSR section of your annual report. It should be in your paid media. It should be in your performance campaigns. It should be tested alongside your product claims in the same A/B frameworks you use for everything else.

At Aragil, we run paid media campaigns for clients across multiple verticals, and the pattern is consistent: when a brand has a credible purpose story, weaving it into acquisition-focused creative does not hurt conversion — it lifts it. Not because consumers are suddenly less rational, but because purpose adds a dimension of value that purely functional claims cannot.

The "Social Washing" Death Spiral

There is a reason the study\u0027s authors emphasize authenticity so heavily. The market is littered with examples of brands that tried to ride the purpose wave without doing the underlying work, and the consequences have been increasingly severe.

Social washing — the purpose equivalent of greenwashing — follows a predictable death spiral. A brand identifies a trending social issue. The marketing team creates a campaign around it. The campaign generates initial positive attention. Then someone — a journalist, an employee, an activist, a competitor — points out the gap between the messaging and the reality. The resulting backlash is disproportionate to the original campaign\u0027s reach because outrage is algorithmically amplified.

The brand then retreats from purpose messaging entirely, concluding that "taking a stand is too risky." This is the wrong conclusion. The risk was never in purpose itself. The risk was in the gap between claim and action. The study\u0027s data confirms this: authentic claims generate massive appeal lifts. Inauthentic claims generate nothing or worse. The variable is not whether to use purpose messaging. The variable is whether you have earned the right to.

How to Operationalize the 70% Rule

Knowing that purpose messaging works is one thing. Executing it in a way that passes the authenticity filter is another. Here is a practical framework:

Audit your actual impact. Before crafting any messaging, conduct an honest assessment of what your brand actually does that has social or environmental significance. Not what you aspire to do. Not what your competitors claim. What you can prove, today, with documentation. If the answer is "not much," start with the work, not the messaging.

Connect claims to core business. Map each social claim to a specific aspect of your product, service, or operations. The connection should be intuitive. If you need a paragraph of explanation for consumers to understand why your brand cares about a particular issue, the link is too weak.

Test with hostile audiences. Do not just test your purpose messaging with friendly focus groups. Expose it to skeptical audiences — critics, industry watchdogs, the comment sections that will actually encounter it. If the claim survives scrutiny from people predisposed to doubt it, it will resonate with the broader market.

Embed, do not append. Purpose messaging should not live in a separate campaign or a dedicated section of your website. It should be integrated into your primary brand narrative, appearing alongside product claims in the same ad units, the same landing pages, the same email sequences. The study explicitly found that layering social claims onto product messaging improved outcomes. The integration is the mechanism.

Measure like you mean it. Apply the same rigor to purpose messaging that you apply to every other claim in your conversion funnel. A/B test social claims against product-only messaging. Track not just engagement metrics but downstream conversion and retention. ROAS on purpose-infused creative versus purpose-free creative. The data will tell you how much the 70% Rule applies to your specific brand and audience.

The Long-Term Loyalty Dividend

The appeal lift measured in the study is a snapshot — a moment-in-time metric. But the researchers also point to a deeper dynamic: authentic purpose messaging builds the kind of brand equity that compounds over time.

Product advantages erode. Features get copied. Price advantages get undercut. But a genuine, well-documented commitment to something bigger than the transaction creates an emotional moat that competitors cannot easily replicate. You can copy a feature in a quarter. You cannot copy a decade of authentic community investment.

This is where purpose stops being a marketing tactic and becomes a business strategy. The 70% appeal lift is the entry point. The real payoff is the long-term loyalty dividend — higher lifetime value, lower acquisition costs, greater pricing power, and the kind of brand resilience that survives market downturns and PR crises.

We have seen this firsthand across client engagements at Aragil. The brands that invest in authentic purpose do not just perform better in one campaign. They build a compounding advantage that makes every subsequent campaign more efficient. Their audiences trust them more, share their content more, and forgive their mistakes more readily. That is not sentiment. That is measurable in CAC, LTV, and retention curves.

The Mandate Is Clear

The NYU Stern study does not suggest that brands should consider purpose messaging. It demonstrates, with rigorous data across seven major brands, that purpose messaging is one of the most powerful levers available to marketers today — when it is authentic, specific, and integrated into the core brand narrative.

The 70% Rule is not a ceiling. It is a floor. Brands that treat purpose as a genuine business strategy, rather than a marketing accessory, will find that the returns extend far beyond a single study\u0027s metrics. They will find that consumers are not just more appealed — they are more loyal, more forgiving, and more willing to pay a premium for brands that stand for something real.

The brands still debating whether to "take a stand" are asking the wrong question. The question is not whether to integrate purpose. The question is whether you have done the work to earn the right to claim it. If you have, the data says the market is waiting. If you have not, the first step is not a campaign. It is a commitment.

Frequently Asked Questions

What is the 70% Rule in brand marketing?

The 70% Rule refers to findings from the NYU Stern Center for Sustainable Business showing that consumer appeal reaches 70% when brands layer three authentic social sustainability claims onto core product messaging. The baseline for product-only messaging was 42%, meaning purpose-driven messaging can nearly double brand attractiveness when executed credibly.

Does purpose-driven marketing actually improve conversion rates?

Yes, when purpose claims are authentic and directly tied to the brand\u0027s core business. The study found that for three of seven brands tested, a social claim outperformed every product-only message. In performance marketing contexts, credible purpose messaging consistently lifts downstream conversion and retention metrics alongside top-of-funnel appeal.

How can brands avoid social washing when using purpose messaging?

Start with action, not messaging. Audit what your brand actually does that has verifiable social or environmental impact. Connect every claim to a specific aspect of your product or operations. Test messaging with skeptical audiences before broad rollout. If the gap between your claim and your reality can be exposed by a single journalist or social media thread, the claim is not ready.

Should purpose messaging be separate from product advertising?

No. The NYU Stern study specifically found that layering social claims alongside product attributes in the same messaging increased appeal. Quarantining purpose messaging into a separate CSR section or organic-only content limits its impact. Purpose claims should be A/B tested in paid media alongside product claims using the same measurement frameworks.

Is the 70% Rule applicable to all industries and brand sizes?

The study tested seven major U.S. brands across different sectors, and the pattern of increased appeal held consistently. However, the specific social claims that resonate vary by industry and audience. The principle is universal — authentic purpose amplifies brand appeal — but the execution must be tailored. Smaller brands often have an advantage here because their purpose stories tend to be more personal, specific, and harder to fake.

What role does authenticity play in purpose-driven brand strategy?

Authenticity is the single make-or-break variable. The study found that generic or disconnected social claims generated no meaningful lift and in some cases damaged appeal. Consumers have developed sharp detection for performative purpose. The only path to the 70% lift is through claims that are specific, verifiable, and intrinsically connected to what the brand does every day.