A big factor in the NIL's that is going to affect CFB (and possibly ruin it) is when say Alabama gets a million dollar NIL deal for a HS athlete to get him to play. Now this HS kid has not played a down of CFB, has not even practiced with the team.
The company paying this kid this money is expecting this kid to be a star immediately and is expecting Saban to put this kid on the field as much as possible. Turns out he needs 2-3 years of development, or is a bust. Saban doesn't play him.
What happens? Now you have these companies butting heads with Saban (or any other coach), because they want a return on their investment. Coach is trying to win games, not appease NIL investors.
Even the best of the best coaches are going to get tired of playing that game real quick, unless the guidelines are set up before the kid signs the dotted line.
...and even then, it won't end.
JMO of course.