How? The schools themselves aren't paying beyond the scholarship and "full cost of tuition". NIL collectives are associated with the school, but they're playing for a players name, image, and likeness, not paying them to play sports....Like an NFL player getting endorsements that technically have nothing to do with their team contract.
Two things I think will have to happen long term are changes to the transfer rules, and changes in NIL contracts to multi-year. We've gone guardrail to guardrail with transfer rules. I'd be in favor of something like 1 "free" transfer, then you have to sit out a year if you transfer a second time. Maybe a waiver if the head coach gets fired or something, but this model of kids looking to transfer every season for a better NIL deal are unsustainable. Then maybe put buyouts in multi-year NIL deals. If you want to transfer to play QB at Auburn, Auburn NIL has to pay your buyout to Georgia's NIL collective or whatever.