Made a throwaway because Central Corporate HR does scour social media, but essentially little filtering is done at amazon. There are shell vendor accounts, BS item listings, and completely inaccurate documentation. Some really shady vendors bait and switch customers outright. The customers get refunded, and the accounts get banned eventually. But amazon does such high volume they can't really stop it.

We have whole departments in India dedicated to account investigations, and you can imagine how effective that is.