I wonder how many accounts Satoshi had in life. And he had them through various VPNs so that they couldn't be tracked easily.
Of course, that isn't accounts in Bitcointalk. But maybe he has several of them right here, and nobody has figured it out, yet.

Why would he use various VPNs? A VPN over Tor would do the job, he is indeed lurking around with different accounts, joining the conversations that are of interest to him. However given the fact that he is a billionaire with so many other important things to do, I doubt he frequents these woods much.