Analysis
The FTC and attorneys general from 22 states sued Amazon on Aug. 31, alleging the company secretly overcharged more than 1.2 million advertisers -- including more than 500,000 small and medium-sized businesses -- by more than $20 billion since 2019, CNBC reported. The complaint, filed in federal court in Seattle, accuses Amazon of manipulating the auction process behind three of its advertising products -- Sponsored Products, Sponsored Brands and Sponsored Display -- through what the agencies call hidden surcharges baked into a 2019 change to its auction rules.
Amazon's advertising business has grown into one of its most important profit engines over the past decade, part of the broader business Pulse has tracked through prior earnings cycles, evolving from a modest complement to its retail marketplace into a unit that now competes with Google and Meta for a share of digital ad budgets. The FTC's theory is that Amazon used its position as both marketplace operator and ad-auction administrator to quietly widen its own margin on winning bids without disclosing the change to advertisers who had no comparable platform to shift budget toward.
Not Amazon's first fight with the FTC
This is not the FTC's first major action against Amazon's core practices. The agency and multiple states sued Amazon in 2023 over allegations it trapped Prime subscribers in recurring payments through a deliberately convoluted cancellation process -- a case that dragged through settlement negotiations for years. The new advertising complaint is separate and larger in dollar terms, and it lands as Amazon's ad business has become central to how the company frames its growth story to investors, alongside AWS and its retail marketplace.
Amazon's defense
Amazon has denied wrongdoing and points to its own data showing average winning ad-auction bids fell roughly 50% between 2019 and 2024 -- evidence, the company argues, that its machine-learning-driven auction system made advertising cheaper over time, not more expensive, per CNN's coverage of the filing. That defense doesn't directly rebut the FTC's specific claim -- that Amazon inserted an undisclosed surcharge layer into the auction mechanics regardless of where average bids ultimately landed -- and the case will likely turn on internal Amazon documents about how the auction algorithm was actually built and disclosed, not on the aggregate bid-price trend.
However, a $20 billion damages claim is a headline number in a complaint, not a judgment -- FTC cases against companies this size typically take years to resolve, and Amazon has the resources and incentive to litigate aggressively rather than settle quickly on unfavorable terms. Whether the case actually forces Amazon to redesign its ad-auction mechanics, or ends in a smaller settlement years from now, remains to be seen, and small advertisers who believe they were overcharged since 2019 won't see relief on a timeline that matches this week's headlines.
The more immediate market question is whether other retail-media platforms running their own ad auctions -- Walmart Connect, Target's Roundel, Instacart's ad business -- now face pressure to publish their own auction-mechanics disclosures before regulators come asking. Amazon's stock barely moved on the filing, a sign investors are treating this as a multi-year legal process rather than a near-term earnings risk.
