The Hidden Engines of Ad Growth: Why Advertising Is Outpacing Consumer Spending

Five forces quietly reshaping the ad market, according to Madison & Wall.

For decades, advertising growth has tracked closely with consumer spending. The logic is straightforward: marketers invest to influence demand, so ad budgets rise and fall with consumption.

But over the past several years, that relationship has fractured. Advertising revenues have grown significantly faster than personal consumption expenditures—despite economic uncertainty, inflation pressure, and uneven consumer confidence.

So where is the money coming from?

According to Luke Stillman of Madison & Wall, the answer isn’t hype, new formats, or AI “magic.” Instead, it’s a set of quieter structural forces—what he calls the hidden engines of ad growth—that are temporarily allowing advertising to run ahead of the broader economy.

As Managing Director at Madison & Wall and formerly EVP of Market Insights, Demand, and Strategic Innovation at MAGNA Global, Luke Stillman is one of the industry’s most trusted interpreters of advertising economics.

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1. Creative Destruction Is Rewriting the Ad Economy

As new, digital-first businesses replace legacy players, overall advertising intensity rises—even if no single company increases its ad-to-sales ratio. E-commerce brands, for example, spend roughly four times more on advertising per dollar of revenue than traditional brick-and-mortar retailers. As these businesses gain share, the entire market becomes more advertising-intensive.

2. Fee Compression Sends More Dollars to Media

AI-driven creative efficiencies, thinner agency margins, and pressure on ad-tech fees mean that more of every marketing dollar is reaching publishers. Even flat advertiser budgets can translate into higher reported ad revenues—a structural shift that quietly inflates topline growth across the ecosystem.

3. Cross-Border Dollars Are Flowing Into the U.S.

International players—particularly from China—are spending heavily to reach U.S. consumers. These dollars don’t correlate with domestic consumer spending, allowing U.S. ad revenues to grow independently of local economic conditions, sometimes for extended periods.

4. Small Businesses Are Now a Major Growth Engine

Automated platforms like Performance Max and Advantage+ have dramatically lowered the barriers to entry for paid media. Small and mid-sized businesses now account for an estimated 37% of U.S. ad revenue, with ad intensity rising steadily as tools become easier to use and justify.

5. Fraud Has Become a Marginal Tailwind

While not a primary driver, some incremental ad spend appears to be linked to fraudulent or deceptive activity shifting onto advertising platforms—another example of money entering the system without being directly tied to consumer demand.

What This Means for Marketers in 2026

Luke Stillman is clear: new technologies don’t expand total budgets—they reallocate them. For CMOs and agencies, the real risk is misreading temporary distortions as permanent growth.

Understanding which forces are structural—and which may fade—will be critical for smarter planning, more realistic expectations, and healthier business models across the industry.

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 In our conversation, we discuss the following:

• You start with the provocative question: Where is all the money coming from? When you look at the past two years of ad growth outpacing consumer spending, what surprised you most in the data?

• Historically, ad growth has mirrored Personal Consumption Expenditures/PCE. Do you believe we are entering a sustained structural shift—or is this a temporary period of distortion?

• You cite “creative destruction” as the first hidden engine. Are we witnessing a permanent re-weighting of the economy toward advertising-intensive businesses—especially digital-native brands?

• E-commerce’s ad intensity is 4x that of brick-and-mortar. What categories do you see as “next in line” for these ad-heavy disruptors?

• Does this shift create better marketing—or simply more marketing?

• Your analysis suggests more of each marketing dollar is reaching publishers due to fee compression across creative, agency services, and ad tech. How transformational is this? And who ultimately feels the most pressure—agencies, ad-tech intermediaries, or marketers themselves?

• AI-driven creative cost reductions are part of this story. Do you see AI expanding total budgets, or simply reallocating existing spend?

• You highlight Temu, Shein, and other international players as major drivers of U.S. ad growth. How sustainable is the cross-border spending surge, especially as regulatory and tariff pressures rise?

• Are we witnessing a new era in which advertising becomes a lever of geopolitical competition for consumer markets?

• What misconceptions do marketers have about the role Small and Mid-Sized Businesses (SMBs) now play in the ad economy?

• Automated tools like Performance Max and Advantage+ have changed the game. Do you expect SMB ad intensity to keep rising—or will it plateau as AI-driven efficiencies mature?

• You delicately raise the issue that some portion of revenue growth may be linked to fraudulent or deceptive advertising. How big a factor is this—honestly? And why is fraud shifting toward advertising rather than other scam channels?

• For CMOs looking to interpret these insights… What does this divergence between ad growth and consumer spending mean for 2026 planning?

• Agencies often point to margin pressure and shrinking scopes. Does your analysis suggest agencies should rethink their business models? Or is fee compression simply the new normal?

• You’re clear that new technologies don’t grow budgets—they shift allocation. What’s the biggest misconception you hear about AI “expanding” the marketing pie?

• Which of the five forces do you expect to be most influential in the next 3–5 years? Which do you believe is likely to fade?

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The key insight for CMOs and agency leaders?

Not all growth means a bigger pie. Some of it reflects where money flows, not why it exists.

As marketers look ahead to 2026, understanding which of these forces are structural—and which may fade—could make the difference between smart planning and costly misreads.