it's a little like campaign contributions. the majority of people who donate to a political candidate are making relatively small donations. but a few wealthy donors make big-money contributions to a campaign or to a PAC.
the same - I believe - is true with NIL. the majority of people who donate to Dinkytown Athletes are relatively small donors. (I gave $275 and will likely renew that for another year). there may be a few donors who give larger sums. But as far as I know, DA does not have a "Phil Knight" or "John Ruiz" type donor who gives 7-figure amounts.