The $ came from at least the early 2000s up to just before NIL. O$U was paying players and there are many examples where it slipped to public awareness- freshman Mo Clarett and his upscale apartment and SUV, AJ Hawk's apartment theft of $10k in cash and video games, Tyrelle Pryor and his summer job in HS and corvette from an O$U backer, $500 handshakes forget who all had gotten caught, signed memorabilia sales before NIL, girlfriends flown to the Rose bowl and luxury hotels, tatoogate, car dealership loaners, the last several head coaches leaving after scandals, etc.
And those are just what became public knowledge because they got caught. I doubt it was 10% of what was actually going on there.
What does PSU have in that era? Curtis Enis sitting the bowl game because of a loan for a couple hundred dollar suit at the Heisman? Cannot think of anything else involving impermissible benefits that surfaced. No, O$U earned the $ in their name. Even the Quinn Ewers NIL deal changing terms was sketchy until they were threatened by ncaa penalties to pay the kid as promised.