FTC alleges Amazon illegally made $20 billion by rigging billions of ad auctions
The FTC and 22 states sued Amazon for allegedly running a secret scheme since 2019 to overcharge approximately 1.2 million advertisers by manipulating ad auction prices through undisclosed "soft reserve prices" Internal documents reveal Amazon used a "proxy 2nd price" mechanism, inserting an invented auction participant to inflate prices beyond what competitive GSP auctions would determine The lawsuit claims Amazon illegally extracted over $20 billion from advertisers through "billions of rigged
Analysis
TL;DR
- The FTC and 22 states sued Amazon for allegedly running a secret scheme since 2019 to overcharge approximately 1.2 million advertisers by manipulating ad auction prices through undisclosed "soft reserve prices"
- Internal documents reveal Amazon used a "proxy 2nd price" mechanism, inserting an invented auction participant to inflate prices beyond what competitive GSP auctions would determine
- The lawsuit claims Amazon illegally extracted over $20 billion from advertisers through "billions of rigged auctions" with hidden surcharges
- Amazon acknowledges using reserve pricing but defends it as reflecting true market value, denying any deceptive intent and accusing the FTC of cherry-picking materials
- Amazon only added reserve pricing disclosures to its website in October 2025, nearly a year after the FTC investigation began in 2024
Why It Matters
This case represents one of the most significant regulatory challenges to digital advertising practices, directly targeting the auction mechanisms that underpin the multi-billion dollar programmatic ad industry. For AI and tech practitioners, it raises critical questions about algorithmic transparency, the ethical boundaries of automated pricing systems, and the growing regulatory scrutiny of platform monopolies that control both marketplace infrastructure and advertising products.
Technical Details
- Amazon's ad platform uses Generalized Second-Price (GSP) auctions, an industry standard where winners pay one cent more than the next highest bid, but since 2019 has overlaid an undisclosed "soft reserve price" that acts as a proxy second price calculated by Amazon itself
- Internal communications describe Amazon using "an invented auction participant representing how much Amazon thinks that particular ad slot is worth" to override actual auction results and set higher prices
- The system was deliberately designed to be undetectable by advertisers, with Amazon conducting large-scale pricing experiments confirming that increased surcharges could be applied without detection
- Amazon distinguishes between "soft reserve" (a real-time minimum reflecting estimated market value) and "hard reserve" (a minimum bid threshold to enter auctions), claiming advertisers never pay more than their maximum bid
- The FTC investigation, launched in 2024, reviewed approximately 1.5 million pages of documents spanning six years to build its case
Industry Insight
- This lawsuit signals intensifying regulatory pressure on tech platforms to disclose algorithmic pricing mechanisms, setting a precedent that could force greater transparency across digital advertising ecosystems and similar auction-based platforms
- Companies relying on opaque pricing algorithms should proactively audit their systems for disclosure compliance, as the "we don't tell them" internal messaging documented here demonstrates how easily corporate culture can create legal liability
- The $20 billion damages claim and potential permanent injunction could reshape Amazon's advertising revenue model and incentivize competitors to adopt more transparent auction practices as a differentiator
Disclaimer: The above content is generated by AI and is for reference only.