FanaHOVA mentioned the main thing you missed. One other thing I'd mention is that a lot of pros have staking arrangements (the article briefly mentions some versions of them). For example, I know one pro (who's won one of the more prestigious WSOP bracelets) who gets 30% of his tournament winnings in exchange for having all his entry fees paid by his backer. I suspect he's traded off more upside in favor of stability than most, but there's a lot of deals out there where the players aren't taking home anywhere close to 100% of their public winnings.