It's commendable that you reverted the decision after you realized that you were wrong. But what exactly was the problem with this user's betting patterns? You mentioned organized groups. Do you believe that his betting resembles that of those who belong to criminal groups who fix eSports matches?
Is there anything else you can share on the topic?
Hey Pmalek,
While I'm not involved in the review process (there's a dedicated team for such), my assumption could be of trying to bypass the limitations set, as the site imposes them for different tiers. For instance, tier D match win limits are capped at $300.
Therefore when OP made the bet around the same time as the other parties, the system most probably flagged his betting pattern to be akin to the above, hence getting caught in the crossfire.
As a casino, we have to protect our interests as well, so usually new accounts might be subjected to manual reviews compared to long-time players that have clean records.
That's just my speculation though, as there are many other ways people would try to game the system. You'd be surprised!