Dawe is stupid, but he can't be that stupid? For revenge alone, he would have denied membership to the MC and taken Troy away. Even if Dawe was stupid enough not to do it himself, he could have told his parents and they would have taken care of it.
It doesn't matter if Dawe has control over his parents, which can actually be ruled out. But Dawe would still be their son. For that reason alone, they would have removed two people with low membership dues, because the that dues would have been non-significant.
Unless Troy and the MC have family connections that could hurt Dawe's family.
It may not only be technically correct, but it may also make sense. I am assuming so that the Gym is owned by the College. If Dawe's family Gym is successful and makes good sales, they will have to pay a lot of taxes. Now that they are sponsoring the Tri-Alphas, they can lower the tax to be paid, which in turn maximizes profits.