People debate with him if it's 500k or 600k. It's not even that high compared to what a lot of players are getting.
Even if he only got 100k, the majority of it is a contract for him to play at Texas, not because they're dying for a short point guard from Wisconsin and Iowa State to sell people Chevrolets in Austin.
I'm just pointing out the payments are very obviously not for NIL yet the court cases were about NIL. I have no clue if the OP makes any sense regarding "gifts", but to my admittedly ignorant legal mind I would think there are some openings because the court cases were about endorsement deals and the payments very obviously aren't endorsement deals.
What if he is getting $15000 from 20 different sources? Perfectly legal and tax free.