Actually, if the info in the article is accurate, the deal is illegal and for several reasons. It doesn't mean that it's necessarily illegal to have a payback clause, but there were several items about the deal that violated laws and regulations.
On that payback, we can all say, he should have read the fine print. How do you or anyone know he didn't? The lawsuit is not claiming anything about that.
Strangely, I find myself agreeing with Josh B on something... the intent of NIL programs is not to indebt players and have them mortgage the future. It is to pay them for the use of their name, image, or likeness. Straight up, very simple. These guys sound more like bookies to me.