QA involves more than just testing - verifying vendors, checking their bona fides, and having relationships/terms that allow for more than just no fault returns

QA involves more than just testing - verifying vendors, checking their bona fides, and having relationships/terms that allow for more than just no fault returns for fraudulent suppliers. Amazon basically has the same broken dynamic as other centralizers like Youtube. They want to promiscuously accept suppliers as if they themselves are just a neutral conduit, while also performing discovery/recommendation across those listings. These are two very different things, and the conflation of them makes it so the barrier to getting in search results / recommended is an afterthought. If the fraudulent books were only reached because OP had come in through a link recommended elsewhere, there wouldn't be too much to take Amazon to task for. The problem is that they're discoverable through their own branded search, hence the blame of quality (or in this case, abject fraud) landing at Amazon's feet.