Normally when athletics are profitable, the athletic dep't grows. When they are not, the college makes up the difference. I've never heard of an athletic department that contributed anything back to the college, at least not willingly.

Well, Purdue does take a big chunk of the Big 10 Network proceeds for the University, when that money is almost entirely the result of the athletic program. However, I wouldn't say the athletic programs are willingly sharing it.

The accounting for college athletics is weird. Do you only count tickets/TV/bowl $$ in? Or do you try and include alumni donations directly or indirectly linked/influenced by sports? How do you know whether or not the alumnus/a would have donated if not for the team? Do you count sports individually or as a whole? - under title IX you can't just cut the women's programs outright. You can manipulate these variable to claim almost anything you want about profitability in either direction.