Also, since potentially affected users lost against FomA in the competition to be admitted, them being accepted would technically mean CM would be paying for posts of inferior quality to those of FomA.

Counter-hypothetical: what if FOMA didn't cheat and made 120 posts per week with one account providing extra free advertising to CM, who could then hire two other users with the same budget and get even more advertising. That's basically how it works with honest participants like LoyceV who often exceeds the 50 post count by a large margin.