The Federal Trade Commission and 22 states have accused Amazon of deceiving businesses by overcharging them to advertise on its platform. This allegedly resulted in 1.2 million advertisers paying more than they realized due to Amazon raising the minimum ad price without their knowledge.

The lawsuit claims Amazon pocketed billions from this practice. Amazon's advertising prices are set through an auction system, where companies bid on ad types and placement.

Further details on the lawsuit, which is the third major one filed against Amazon by the federal agency, are available from the source, including a related story on the value of Amazon Prime.