I wouldn't expect cheating as the problem but I would assume it's done more in the F2P category. Anything with a loot box just feels unfair to anyone who doesn't play the game if it affects stats and a lot of that can be related to how much money they make as well. If I were an eSports player I would look at the games where that can't happen to avoid the trouble altogether. Otherwise, Mystery Inc. would be on to me.