Do you think NFL contracts are “clear written agreements“? NFL players hold out all the time for new contracts and it lasts more than 15 minutes. To me this feels like the college version of holding out.
It's similar, but in the NFL it's transparent. A player doesn't show up to OTAs, holds out, etc, there are clear penalties for it. The player has that choice, and the team has penalties for it. So while a player is holding out for a new contract, both parties are really still operating under the original contract, where it's clearly spelled out what the player misses out on if he doesn't play or practice.
This is at worst verbals that lead to he said-he said arguments. There may be really detailed and elaborate agreements for NIL out there that spell out every detail and contingency. But I don't know.
Eventually this will either get to a point of really detailed contracts like the NFL, or it will keep blowing up in schools, players, and collectives faces.