> According to the FTC, Amazon told more than 500,000 small and medium-sized businesses that it ran a “second-price” auction where the winning advertiser would pay just one cent more than the next-highest bid, rather than the full amount of their own bid.

> But the FTC alleges that starting in 2019, Amazon made a “surreptitious” change without telling advertisers. It added a hidden surcharge that Amazon internally called a “soft reserve price,” and used what one internal document called an “invented auction participant” — a fake bidder, basically — to push prices higher than true competition would have produced.

Straight up fraud, if it's as they say.