Was on facebook, and got the idea of searching for Fiverr Review.
What did I get? Tens of pages and private groups all with names like “fiverr review exchange”. Some of them have around 10k active members. I couldn’t see the private groups, and a lot of the descriptions weren’t in english. All the pages and groups seemed to be from a select few countries.
The pages are open and sell $5-$100 5 star reviews from “top canadian, uk german, american” accounts.
One of the pages boasted that recently one of their members had achieve TRS status, and that another “had started from scratch and was making 500€/month”.
There’s a massive ratings manipulation going on, and it seems to work at least sometimes. This affects almost exclusively low value orders, since they must be paying the Fiverr commission for placing those reviews, and that would get expensive fast.
Very conservative estimate - around 25k sellers (or people looking to be sellers) engaging in some kind of review trade/purchase, or at least interested in it.