No Quarterback said:
How would they know? Until you can do an open records request to every D1 university and make them tell you what they paid for X player, it's all kinda bogus. PFF is also suspect imo
From what I could gather, this guy seems to be some kind of consultant, and his research is based on those he's worked with. His stated mission is providing transparency to the NIL process, so players and schools can make more informed decisions. I don't know what his data points are, but he says these are based on more than 1,000 contractual data points.
And it's important to point out these are medians. There will be a few on the high side that go well past these numbers.