NBA players can play in the Olympics. The amateur thing is long gone.
The the question remains, how far does it trickle down - high school? junior high?
It already has. Some of the local AAU teams are sponsored by Adidas and Nike and that coach is getting compensated and using that money to attract top talent. Then steering those players to Nike or Adidas colleges. NIL has likely watered that practice down, but that was going on 20 years ago.