At my school, the Student Government Association will give money to Greek organizations to help pay for events that are open to all students on campus, are alcohol-free, and require no admission. For example, Sigma Nu got money to sponsor the Ms. College of Charleston pageant, which raised money for the Special Olympics. So in the case of BU, I can only assume it would be kinda the same way. I don't think the True 2 slate wants to just randomly give Greeks money so they can all go out and buy themselves new house jerseys or something.
And yes, it's also very frustrating to hear over and over again people ignorantly perpetuating the negative Greek stereotypes. What can you do? Keep on keepin' on....