That's because he's replying directly to Arrington. Would be hilarious if he kept insisting he's a "cofounder" on the same thread. But just do a google search

That's because he's replying directly to Arrington. Would be hilarious if he kept insisting he's a "cofounder" on the same thread. But just do a google search and you'll see that the guy has been really capitalizing on the "TechCrunch Cofounder" brand for almost a decade now.