Go to The Top Left Corner Where you would usually click To Get to Forums. Find Account and Connect to Facebook or an Email.
People can "dvp" each other money, or drop volley partners. Basically, one person buys cheap tutors and the other person goes back and forth with "Person A" to volley the tutor. It makes a profit for both parties, but Person B, if receiving the money, would volley until they achieve, for example 20b. Person A would then keep the tuts and either get stripped of them (have someone else, Person C, buy those overpriced tutors), or drop them for about a 55% return on money invested into that tutor.
It doesn't break any rules at all but if it offensive take it up with an admin/owner to try and resolve the issue