Yes, using AI to spot fake reviews seems like a fools errand to me. However, why doesn't Amazon only allow those who have purchased to leave reviews? And to b

Yes, using AI to spot fake reviews seems like a fools errand to me. However, why doesn't Amazon only allow those who have purchased to leave reviews? And to ban any company offering monetary or equivalent incentives to leave reviews? I suggest they are not even trying to tackle the problem.