Without a doubt, schools are still trying to figure out NIL, but right now, if a person donates to the school, that is tax deductible, but donations to a schools NIL fund are not, until that change is made by the Feds, I think, few schools are going to be pushing that avenue. Some would say, they can drop season ticket prices also, but we know that will not occur either.
Using NIL funds to pay the players from the schools money makes them employees, which just add a ton of laws to protect them, not least of which is allowing the players to then unionize. There has been a push from people to make the refs fulltime employees rather than at will hires. Both the NFL and colleges have refused to go down that path.