The most talented kids can make more money via NIL that would come with the exposure of going to college. It may even deter kids from going the G-League Ignite path, let alone Overtime.
Going to Ignite, Overtime, or whatever minor league option available, the NIL money will likely be minimal since no fanbase will be tied to the player until they make it to the NBA. Overtime helped create the culture that kids don't care for teams, only for players and that would hurt them in starting a league and ironic they would go this route.
We don't know what the money will look like, but NIL money for college players could be pretty good and likely substantial for basketball's best players that maybe a $100k NIL deal and NCAA exposure on ESPN/FOX/CBS outweighs a $200k contract to play on Ignite with games airing on NBATV at 12 PM on a Tuesday and having minimal fan support prior to getting drafted.
It's funny the NCAA dragged its feet so long on NIL, because it may be the very thing that keeps leagues like this from having a chance of surviving. Even without NIL, most kids would not be good enough for this league and still want the free education or as others noted at a minimum want to get their high school diploma.