Amazon accused of rigging ad auctions in $20bn FTC lawsuit

The lawsuit, filed Monday in Washington state, alleges that Amazon overrides and replaces actual auction results with higher prices to increase its profits. In the company's Sponsored Products and Sponsored Brands advertising system, brands bid for placement when customers search for keywords. The system operates as a "second price" auction, where winning advertisers expect to pay one cent more than the next highest bidder. However, the complaint claims Amazon charged advertisers their own winning bid close to 80% of the time, pocketing the difference.

The FTC and states argue that consumers have also been harmed as advertisers pass the extra costs onto shoppers. "Consumers are suffering, have suffered, and will continue to suffer substantial injury as a result," the complaint states.

Amazon strongly disputed the allegations, calling the suit "misguided" and insisting it does not mislead advertisers. "The FTC wants the public to believe this case is about higher prices for consumers. It is not," the company said in a statement.

Amazon's shares fell 2.5% on Monday following the announcement.

Why This Matters

The lawsuit targets a core revenue stream for Amazon at a time when advertising has become one of its fastest-growing businesses.
If proven, the alleged manipulation could mean advertisers have overpaid by billions, potentially affecting pricing across the broader e-commerce ecosystem.
The case signals continued regulatory aggression against Big Tech from the FTC under its current leadership.

Background

Advertising on Amazon's platform has become a critical tool for brands to gain visibility among the hundreds of millions of products listed. Sponsored ads operate on a real-time auction model. In a standard second-price auction, the winner pays one increment above the second-highest bid. The FTC alleges Amazon secretly changed the rules without telling advertisers, effectively charging them the maximum rather than the market-clearing price.

Key Perspectives

Amazon: Denies the allegations, calling the lawsuit "misguided" and arguing it does not mislead advertisers. It contests that any harm to consumers flows from its ad pricing. FTC and state attorneys general: Argue that Amazon's actions constitute unfair or deceptive practices that have cost advertisers billions and ultimately raised prices for shoppers. Advertisers: The alleged victims, who may seek restitution if the claims hold. Some small sellers have long complained about rising advertising costs on Amazon without clear pricing transparency.

What to Watch

Amazon's legal response and any motion to dismiss the case.
Discovery phase documents that could reveal internal communications about the auction system.
Potential parallel investigations or class-action lawsuits from affected advertisers.
Impact on Amazon's advertising revenue growth in upcoming earnings reports.

ZOTPAPER