The real answer here is that he is mad about people protesting what Israel is doing in Gaza. This $100M donation is being made with funds he had given to UPenn. He has taken it back, via lawyers, because they allowed the protests to go on. He is now just taking that original donation and moving it somewhere else. Not that I am against the Olympians getting paid, just some context.
Sources: https://philanthropynewsdigest.org/news/donor-pulls-100-mill... https://thehill.com/homenews/education/4348656-upenn-loses-1... https://www.timesnownews.com/world/who-is-ross-stevens-stone... (many more)