The short version
- A bipartisan group of twenty-two states and the Federal Trade Commission filed a lawsuit alleging Amazon manipulated online ad auctions to overcharge more than one million customers.
- Regulators claim the scheme generated approximately $20 billion in excess revenue for Amazon since 2019 by replacing actual auction outcomes with higher, company-set prices.
- Amazon rejected the allegations as misguided, arguing that advertisers focus on performance metrics rather than auction mechanics and noting a significant drop in average winning bids over recent years.
The Federal Trade Commission and a coalition of twenty-two state attorneys general have initiated legal action against Amazon, accusing the technology giant of secretly manipulating its digital advertising auctions. The complaint, filed in Washington state, alleges that the company systematically overcharged more than one million advertising clients by overriding standard auction results with artificially inflated prices set internally to boost corporate profits.
According to the regulators, this alleged pricing scheme has likely generated an additional $20 billion for Amazon since 2019. The lawsuit contends that these excess costs were not absorbed by the company but were instead passed on to consumers, resulting in substantial financial injury to shoppers who pay higher prices for goods sold on the platform. The complaint emphasizes that both advertisers and end-users have suffered from these practices.
The core of the dispute centers on how Amazon handles 'second price' auctions for Sponsored Products and Sponsored Brands ads. In a standard second-price auction, the winner typically pays just one cent more than the second-highest bid. However, the FTC and states allege that Amazon charged advertisers their full winning bid amount in nearly 80% of transactions, deviating significantly from the expected market mechanism.
Amazon has strongly disputed these claims, characterizing the lawsuit as misguided and asserting that the regulators fundamentally misunderstand how digital advertising operates. The company argues that advertisers adjust their bids based on real-world performance data rather than theoretical descriptions of auction mechanics. Amazon maintains that it did not mislead its clients regarding pricing structures.
To support its defense, Amazon pointed to internal data showing that average winning bids for Sponsored Products search ads fell by 50% between 2019 and 2025. The company also noted that roughly 92% of placed advertisements are not awarded to the highest bidder, suggesting that its auction system functions differently than the regulators describe. Amazon insists that the FTC is attempting to frame the case as a consumer price issue when it is not.
The legal filing suggests that Amazon’s motivation for altering auction dynamics stemmed from dissatisfaction with the revenue generated by its existing advertising auctions. By replacing actual auction results with higher prices, the company allegedly sought to increase its profit margins directly. This practice reportedly affected millions of brands and sellers competing for visibility when consumers search for products using specific keywords on the e-commerce platform.
Market reaction to the news was immediate, with Amazon’s shares closing 2.5% lower on Monday following the announcement of the lawsuit. The drop in stock value reflects investor concern over potential regulatory penalties and the broader implications of antitrust scrutiny. This case adds to a growing list of legal challenges facing major technology companies regarding their market dominance and pricing strategies.
This litigation follows a previous settlement between Amazon and the FTC, where the company agreed to pay $2.5 billion over allegations that it enrolled millions of consumers in its Prime subscription service without proper consent and made cancellation difficult. That case involved civil penalties and consumer refunds, highlighting ongoing tensions between the e-commerce leader and federal watchdogs.
As the legal battle proceeds, the focus will likely shift to determining whether Amazon’s auction practices constitute deceptive trade practices or illegal monopolistic behavior. The outcome could set significant precedents for how digital marketplaces manage advertising revenue and interact with both sellers and consumers. Regulators aim to prove that the alleged scheme caused widespread harm, while Amazon seeks to demonstrate that its pricing models are transparent and performance-driven.
The case underscores the increasing scrutiny of big tech’s advertising ecosystems, where opaque pricing mechanisms can obscure true costs from buyers and sellers alike. Whether the courts side with the FTC and states or Amazon will depend on detailed analysis of auction logs, internal communications, and the actual impact on advertiser spending and consumer prices. The resolution may influence future regulatory approaches to digital marketplaces across the United States.
Sources behind this briefing
Go to the original reporting
- BBC Business↗Amazon rigged billions in ad pricing, lawsuit from states and US watchdog alleges
