The Measurement Problem: Creator ROI Is Still Broken

The Measurement Problem: Creator ROI Is Still Broken

Spend on creators just crossed $10 billion — the infrastructure to prove it works is still missing, and that gap is becoming the industry's defining problem.

For most of the last decade, the inability to measure influencer marketing was treated as a footnote — a known imperfection in a channel small enough to fund out of experimental budgets. That era is over. In 2025, US influencer marketing spending crossed $10 billion for the first time, reaching $10.52 billion, a milestone eMarketer says arrived a full year ahead of its own forecast.¹ This is no longer test-and-learn money. It is institutional-scale budget, defended in the same rooms as paid search and television.

Which is exactly why the measurement problem has stopped being a footnote and become a crisis. When you spend ten billion dollars on anything, someone eventually asks what it returned — and for creator marketing, the honest answer is still some version of "we think a lot, but we can't cleanly prove it." The market has grown faster than the apparatus for valuing it. That is not a moral failing of marketers; it is a structural gap in the plumbing.

The interesting question is not whether creator ROI is hard to measure. Everyone agrees it is. The interesting question is why — and what the answer tells us about the infrastructure the next era of media still needs to build.

The money is real now

The scale frames everything. Goldman Sachs estimated the global creator economy at roughly $250 billion in 2023 and projected it could approach $480 billion by 2027, driven by short-form video monetization and the collapse of barriers to content creation.² That figure remains the most-cited institutional benchmark for the sector — and it describes a market roughly the size of a national economy whose returns still cannot be attributed with confidence.

The US slice is maturing in real time. Growth slowed to 15.0% in 2025, down from 23.7% in 2024, as the channel diversified and budgets spread across surfaces.¹ eMarketer's Jasmine Enberg put it plainly: "Influencer marketing is maturing and diversifying. The boom days of spending growth on social media sponsored content are largely over."¹ Maturation is the right word. The problem is that mature channels are measured channels — and this one isn't yet.

Why it can't be measured: fragmentation, not laziness

The central misconception is that better measurement is a matter of trying harder. It isn't. The Influencer Marketing Hub, which surveys the industry annually, frames ROI measurement as "a structural constraint rather than a solved problem," with between 26% and 60% of marketers — depending on the study — naming it their single biggest challenge.³

The diagnosis is infrastructural. Campaign signal ends up "scattered across creator reports, affiliate dashboards, Shopify, Meta Ads Manager, spreadsheets, and attribution tools that barely connect with each other."³ Each tool sees a fragment; none sees the whole. And the hardest case is the most valuable one: organic, untagged content, where a creator features a product with no formal partnership and no tracking link. The mention that moves the most trust often leaves the least data.

Fragmentation is getting worse, not better, because the channel itself is splintering. For the first time in 2025, more than half of US marketers used influencer marketing on YouTube; TikTok's 17.0% growth now runs roughly on par with Instagram and YouTube; and budgets are flowing into paid social, TV, digital out-of-home, and podcasts.⁴ Value is now generated across surfaces no single attribution tool can observe. The more places creator content runs, the less any one system can see — and the harder single-source ROI becomes by construction.

The attribution apparatus underneath is collapsing

Creator measurement was never a standalone system. It was bolted onto the broader digital attribution stack — and that stack is breaking down. As third-party cookies deprecate (eMarketer notes almost 90% of US browsers could become cookieless), user-level tracking is losing its foundation.⁵

The industry is migrating, not patching. eMarketer and TransUnion found that over half — 52% — of US brand and agency marketers now use incrementality testing and experiments, with 36.2% planning to spend more on it over the next year.⁶ Trust has shifted accordingly: only 11.7% of marketers most-trust third-party multi-touch attribution, while marketing mix modeling (MMM) leads at 30.1%, and 61.4% are looking to augment their strategies with faster MMM.⁵ This is the shape of the emerging answer — measurement rebuilt on incrementality and modeled inference rather than the fiction of perfectly tracked individual journeys.

Confidence is stalling, not improving

Here is the uncomfortable part: even as the methods evolve, marketers' faith in their own numbers is flat. The IAB's State of Data research found marketing measurement confidence stalled in 2025 — 54.1% of marketers reported no year-over-year change, and 14.3% said their confidence actually declined.⁷ Among buy-side users of AI-powered measurement, 60–75% believe the approach falls short on rigor, timeliness, trust, and efficiency.⁷

The IAB's conclusion is the most consequential framing in this entire debate: current marketing mix models fail to reflect how consumers actually consume media, leaving "billions of dollars in media spending unaligned with goals."⁷ That is a trade body — the industry's own standard-setter — describing standardized, interoperable measurement not as a competitive feature but as a missing public utility. The plumbing isn't just leaking. It was never fully laid.

The Theodyx Perspective

Step back and the picture resolves into a single dislocation: attention has already moved to creators faster than the systems for valuing them have caught up. The Reuters Institute's Digital News Report 2025 found that news personalities and creators "often eclipse traditional news brands in terms of attention." In the week after the US inauguration, 22% of the American sample encountered news or commentary from Joe Rogan alone. Video-based news consumption rose from 52% in 2020 to 65% in 2025, and six online networks now reach more than 10% of people weekly with news — up from just two a decade ago.⁸

This is the heart of it. The economy has voted with its attention for human expression — the specific, irreplaceable voice of a person — while the infrastructure for pricing that value lags years behind the reality. The measurement problem is not a technical inconvenience on the way to a solved market. It is the market telling us what it still needs built.

Theodyx's belief is that the one thing automation cannot replace is human expression — express what only you can. The corollary, often missed, is operational: if human expression is the asset, then the layer that measures its value is infrastructure, not a vendor's dashboard feature. The emerging consensus — incrementality, modeled measurement, and shared standards — points the right direction, but direction is not the same as a built system. The companies that treat transparent, interoperable measurement as public infrastructure, rather than a proprietary edge, will define how the next $480 billion of creative work gets valued. Spend is real. Attention is real. The measurement layer is the thing still waiting to be built — and that is precisely where the opportunity lives.

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Sources

¹ eMarketer, "US Influencer Marketing Spending Will Surpass $10 Billion in 2025," Mar 13, 2025 — $10.52B total, +15.0% YoY (vs. 23.7% in 2024); Enberg quote.

² Goldman Sachs Global Investment Research, "The creator economy could approach half-a-trillion dollars by 2027," Apr 19, 2023 — ~$250B (2023) growing toward ~$480B by 2027.

³ Influencer Marketing Hub, "Influencer Marketing Benchmark Report," 2025 — 26–60% name ROI measurement as #1 challenge; data "scattered" across disconnected tools; untagged organic mentions hardest to track.

⁴ eMarketer, "US Influencer Marketing Forecast 2025," Mar 13, 2025 — >50% of US marketers now use YouTube; TikTok growth 17.0%; budgets diversifying into paid social, TV, DOOH, podcasts.

⁵ eMarketer / TransUnion, "Measurement challenges, opportunities, and strategies for 2025," Dec 4, 2024 — MMM most-trusted at 30.1%, third-party MTA at 11.7%; ~90% of US browsers could become cookieless; 61.4% want better/faster MMM.

⁶ eMarketer / TransUnion, "Incrementality takes center stage," Jul 2025 (n=196 US marketers) — 52% now use incrementality testing/experiments; 36.2% plan to increase spend.

⁷ IAB, "State of Data 2025 Companion Guide," Mar 2025 — confidence stalled: 54.1% no YoY change, 14.3% declined; 60–75% of buy-side AI users cite shortfalls; misaligned MMM leaves "billions in media spending unaligned with goals."

⁸ Reuters Institute for the Study of Journalism (Oxford), "Digital News Report 2025 — Mapping news creators and influencers," Jun 2025 — creators "often eclipse traditional news brands" in attention; Rogan reached 22% of US sample in one week; social video news up from 52% (2020) to 65% (2025); six networks now reach 10%+ weekly vs. two a decade ago.