I think the problem here is that the products that aren't cheating on their reviews will get ranked lower. So although they're perfectly fine products, if they

I think the problem here is that the products that aren't cheating on their reviews will get ranked lower. So although they're perfectly fine products, if they drop to the second page of search results you might never actually open them up to read their real human reviews. You can still read the real detailed reviews on the products you do look at, so you'll avoid buying a lemon, but you will be preferentially buying from review cheaters.