If the bail really averaged 35 grand I know a lot of those frat daddies' parents will pay that. Probably close to covering the expenses.
It's my understanding that bail money is typically returned to the suspect once they've met all the terms of the court.
"Bond" is different. When you bond out, you are giving someone 10% of the bail to post for you. The bondsman gets the bail back (if you satisfy the court) and keeps your bond money.
It's the bondsmen that'll get rich.
I've always been released on my own recognizance, however.