Came here after reading a thread
[probably by one of your team members] on meta...
3.8.6. the author left reviews about the same exchange or company under different user names;
What type of security measures you have in place to combat such issues? Is it based on IPs, content, or something else?
PROBLEM SOLVING
If the exchange/company solves the problem on the review with a negative score (from 1 to 3), the user has the opportunity to report this to the site Administration. This will have a positive effect on the company's rating.
Does it mean that you've notified every single one of the platforms that you've listed prior to their listings?
It's always nice to see another review platform but it's getting harder and harder to trust online ratings/reviews.