> Honestly it's really hard to believe you.
Yeah, I get it. For what it's worth - I didn't just get told they care, I saw some of the systems that were built to work on detection.
Amazon is not a very short-term oriented company. They're usually pretty good at caring about long-term dominance to get dollars in ten years rather than pennies today. It's clear as day to anyone that fake reviews are hurting their image to customers, eroding trust. That's leading people to buy stuff elsewhere.
At the same time, Amazon Marketplace is one of the underappreciated masterstrokes from Amazon over the last 15 years and has driven a huge increase in their retail revenue, which you can see in annual reports. So, certainly they're unwilling to take really dramatic action like dropping 3rd-party sellers entirely. But I still think they realize fixing this is pretty crucial for the long-term health of the retail business.
It's hard for me to explain the cases where people find obvious fraud and the seller doesn't get penalized. These would get flagged internally in mailing lists too, and most of the time it was a process error somewhere - a ticket that got dropped when shuffled between the zillion different departments; Amazon's internal bureaucracy is truly insane and huge. I think it's usually incompetence rather than devious cleverness, honestly.
There are probably some other cases that are more complicated (sellers reopening new accounts, and then doing social engineering on unwitting poorly-paid support people to regain listings). I think those are kind of rare.
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Anyway, all this to say: I get it, it's hard to believe because it's easy to think of Amazon as all-powerful. But... they're really not. It's a huge, slow, bureaucratic, sludgy company. They have some money (okay, a lot of money) and technical talent but it isn't super clear how you'd apply those to this problem. It's hard.