What do you mean "defeated", lol? I don't think it's anything specific. Maybe he's just taking a break from posting for a while and chilling.
SF/QO does not do that. He's amassed tens of thousands of posts on numerous accounts, faster than anyone, keeping his daily average hovering around 45. That's insane when you consider that even 240 (who has now surpassed Bluto by a couple thousand) does not have. You do not just leave, he's been addicted to the site like Vince G jerking off to cross-eyed gay porn.
QO tucked his tail and ran. He still checks in, so he can get his fix, but I wouldn't be surprised if he's posting under a gimmick and just checks into his other account to try and fool the PI's on the site. He's addicted to the site, and he'll want to keep posting here for as long as he can. That little walnut in his head is trying to think of new schemes to throw the vet's of GetBig off his scent.