No, that's not my point, as a commented elsewhere. Even restricting it to "outside investor returns generated by billionaires", this list is only looking at out

No, that's not my point, as a commented elsewhere. Even restricting it to "outside investor returns generated by billionaires", this list is only looking at outside investor returns since the IPO and in excess of T-bill returns. Drew Houston generated tons of wealth for outside investors, but only for pre-IPO investors, hence he's on the list with a -3B number, because post-IPO investors have done so poorly.