In other words, he could indefinitely give all 70 Oregon scholarship players $4M each year and have it be less than a tenth of the money he gains from interest, leaving him $2.7B in spending money each year for other ventures, without having to even touch his principle.

And that's assuming he isn't working or increasing his value in any way.

Giving a top end recruit $10M to play means almost nothing to him, but would definitely sway me to whatever college he wanted me at