It appeared he was using Microsoft's cloud for his server and mailgun.org for his email. Either of those places should have more info on him, including his payment info, that may help track him down. Just in case anyone is interested.

The longer this goes the more likely it was a scam. Its also possible he got hacked and doesn't own the private key with that coin on it, among other possibilities. The timing of the disappearance and the simultaneous disconnection of other services suggests scam. Considering how much effort he put into the scam it is likely he's obfuscated his information on those sites as well.

I'd just like to point out that the entire premise of this pool was faulty. There are fair and trusted pools that already "help decentralize the network" including kano.is. The problem isn't that there aren't pools, the problem is that there are nearsighted people who have no patience and would rather mine at a larger pool in order to decrease their variance. I'd love to see people flock to a pool like Kano.is so it was hitting blocks more regularly. That's really all that is necessary for many people to bring their hash back from the large PPS pools. A pool like Nexious was harming rather than helping in this regard.