As it currently stands NIL funds are year to year and dependent on the sponsor renewing every year. Maybe that sponsor’s business isn’t doing as well, and so they choose to cut funding on their NIL deals.

An “endowed NIL” would act like a traditional endowment where the interest funds the annual NIL deal into perpetuity. Perhaps you would have “endowed NILs” for player captains, a certain position (QB for example), or any other criteria.

Needless to say the dust still hasn’t settled with NIL.