Its true that he promoted what we NOW know to be a ponzi, but we are assuming it is his responsibility to repay the damages of those who lost money. And not the creators of the platform that harmed those users, and promoters. What you expect of him is sort of like if a stock loses value do you pursue the trade agent to recover your damages... Or if you go to a store and find out a product you bought is defunct, do you demand a refund from the cashiers pockets or the company's register.... He is the face we see, but he was one of those people who lost something as well in the end...