- 2 pack scammers that sell someone else's product as a bundle, but it costs more to buy the 2 pack than it does to buy the real item twice.
- Listing swaps, where someone will take a commodity listing with lots of reviews and change the listing to sell overpriced broken garbage
- Counterfeiting or extreme product cheapening after a listing receives recommended status
- A mountain of fake review schemes now including this.
These bad actors don't contribute to the Amazon market. There's little reason not to ban them for ToS violations.