Posting that reviews are fake in a review makes Amazon look bad and goes to somebody who can't penalize the merchant. That's why they removed it. Telling Amazon

Posting that reviews are fake in a review makes Amazon look bad and goes to somebody who can't penalize the merchant. That's why they removed it. Telling Amazon directly that a merchant is paying for fake reviews doesn't make Amazon look bad, could get routed to somebody who can penalize the merchant, and is more likely to get results. I'm not justifying Amazon's actions here — just explaining the reality of the situation.