So how does Amazon earn money when selling fake reviews? I can't be just from extra overall sales, there must be some other source of income. Do those reviews typically go with ad spend so they turn blind eye (used to be the case with Google?
I think you may be misinterpreting something, as I don't believe anyone is suggesting that Amazon earns money from fake reviews. (Or more weakly, that Amazon is incentivized to allow fake reviews.)
