To give them a bit of credit, Amazon did ban giving reviewers cheap or free products in exchange for reviews a few years ago. They also shut down 3rd party site

To give them a bit of credit, Amazon did ban giving reviewers cheap or free products in exchange for reviews a few years ago. They also shut down 3rd party sites that were facilitating the buying and selling of reviews. https://www.consumerreports.org/consumerist/amazon-bans-most-users-from-writing-reviews-in-exchange-for-free-discounted-items/ https://www.consumerreports.org/consumerist/amazon-bans-most... https://www.bbc.com/news/technology-32251698 https://www.bbc.com/news/technology-32251698 I bet there is more they could be doing, but you can probably never totally solve the problem.