Could probably keep this simple. Say a group of alums start "fighting farmers NIL, LLC."
They offer all A&M commits a 3 year deal, with a corporate option for year 4 and 5. The deal would pay a monthly base, plus more for games started, number of snaps played, number of snaps played against conference opponents and bowls, awards won, success of the team, etc. A material Part of that deal requires the student to be enrolled at and playing for A&M. The contract could require any legal dispute to be settled in Brazos County.
He's locked in at that point. He transfers, we go to court in front of an Aggie judge and take whatever money he is making at the new program. Would only have to do that once to make the point.
I guess we could see issues where a 3rd year player projected to go late in the draft threatens to declare if the contract is not reworked. Those would be uncommon. And heck, wouldn't it have been worth it to pay Bobby Brown $50k to stay another year?
With both brown and McKinley in the rotation, opponents could forget about running inside.