US FTC Plans to Sue Amazon Over Alleged Ad Auction Manipulation
nashnova research
The FTC plans to sue Amazon this week, alleging the company secretly inflated ad auction prices for seven years and extracted tens of billions of dollars; this third major FTC case against Amazon could reshape digital-ad pricing rules.
What did Amazon actually do?
Starting in 2018, Amazon inserted a hidden "soft reserve" — a minimum price set by the platform itself — into its ad auctions, artificially raising the price advertisers paid.
In plain terms = advertisers were bidding against each other, but Amazon secretly sent in an invisible bidder offering more, forcing everyone to pay extra.
Advertisers could see their own bids but had no idea Amazon was manipulating the outcome. The FTC calls this deception.
How widespread is the damage?
The tactic was initially deployed only during peak shopping seasons, so advertisers assumed higher prices were just holiday competition.
In recent years Amazon expanded the intervention to 70%–80% of all auctions; during major sales events, cost per click jumped 50%.
This means → the vast majority of merchants advertising on Amazon have been overpaying for years without knowing it.
What gives the FTC its leverage?
Attorneys general from more than 20 states joined the suit on a bipartisan basis, including New York, California, and Florida.
State AGs have the legal power to seek civil penalties and attempt to recover the excess fees advertisers paid.
This reflects a rare cross-party consensus — discontent with Amazon's ad practices is not a partisan issue.
How important is Amazon's ad empire?
Amazon is the world's third-largest digital-ad platform, behind only Google and Meta, with $68 billion in ad revenue in 2025.
This is the FTC's third major case against Amazon — the Prime deceptive-enrollment suit settled last year for $2.5 billion; an antitrust case goes to trial next year.
This means → Amazon faces systematic regulatory pressure from the FTC, and now its most profitable growth engine — advertising — is in the crosshairs.
What is the key question for the court?
Amazon mentioned a "reserve pricing" mechanism on a public webpage and noted that ad costs may vary during peak seasons — but never disclosed that it was actively bidding up prices.
The core dispute = does mentioning "reserve pricing" count as adequate disclosure, or is failing to reveal the secret mark-up itself deception?
The ruling will set a precedent for the entire digital-ad industry: can a platform manipulate auction prices without telling advertisers?
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