Amazon's solution to fake reviews is Amazon Basics, a "verified good" version of whatever you were looking for. Thus, they have little incentive to combat fake

Amazon's solution to fake reviews is Amazon Basics, a "verified good" version of whatever you were looking for. Thus, they have little incentive to combat fake reviews for products not directly sold by them, since that bad experience, they hope, will cause you to run back to them for the product next time. They also get to avoid being called a monopoly by selling products of various qualities and from various sellers.