I hope someone corrects me if I am wrong, but around two years ago he backed out of any responsibilities (ceo) after he bundled mobilecoin into the app.
That that was his intention is the impression he left, with people like me at least - a quick glance shows its price only went down after he stepped down. Who knows how much he has invested/made ¯ \ _ ( ツ ) _ / ¯ I don't hold it against him if he is a true believer. I feel like integrating it makes as much sense as Twitter becoming a payment processor, but hey.