I worked in a part of Amazon that had a lot of ability to help detect and flag this sort of fraud. I had to fight hard to get even a proof of concept project greenlit.<p>There was exteme organizational disinterest - partly for a bad but predictable reason (we made a lot of money off these fraudsters) and partly for a reason so bad it still makes me cringe (money recovered from identified fraudsters went into the balance sheet of a different SVP's org, so our org viewed it as a waste of time).<p>I made the case that the longer we let the problem fester, the less people would trust Amazon to buy anything. Leadership didn't really care but got sick of me constantly making noise about this and eventually signed off. That said, at my project's peak I had four engineers and one data scientist. Compare to consumer fraud and vendor fraud, both of which negatively impact Amazon directly, which were fought by entire VP-level orgs of hundreds of people.<p>In the end we put together a system that detected blatant fraud easily and in worrying volume, but as soon as I left - which meant there wasn't anyone in leadership sponsoring it - it was quietly mothballed.