This should surprise precisely no one. It's called the Yelp business model and it's been around for 10-15 years. You allow paying customers to remove bad review

This should surprise precisely no one. It's called the Yelp business model and it's been around for 10-15 years. You allow paying customers to remove bad reviews. Shocker. In Yelp's case, you also give paying customers better search visibility. It's never as straightforward as "if you pay, you can remove bad reviews". It's always couched in some form of plausible deniability, like reviews that violate a ToS or community guidelines in some nebulous way.