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.
