As
Holy Bacchus said, HOTs (supposedly) get free tuition and the Scavenger Hunt is the test to become a HOT.
No, DavDR, I evaluate the game based on the information it presents, or at least I try to. Your problem is that you demand to be the sole arbiter of the "proper" way things are done, then castigate the game any time its judgement differs from your own.
Whatever the Plantoic 'purpose' of a sorority, Maya is free to join for
any reason she wants. If the other HOTs feel her reasons are inappropriate they can certainly take actions to remedy that, but that still wouldn't be a case of manipulation. In the event, none of the HOTs sisters had any problem with Maya joining; even Quinn had to accept her, because Maya did what was asked of her.
Maya only became angry when Quinn backed out of the offer she made to Maya. Yes, that offer was illicit, but that's entirely on Quinn. Yes, the offer was verbal and vague, but again,
that's on Quinn! You're not going to prove Maya is some sort of grifter by showing Quinn taking advantage of her!