Yes, he was the admin of a server that hosted hundreds of other sites. Each of those sites had their own admins, ie people who operated the account and the software on that onion, but he was the overall admin of the server. You can host multiple onion domains on one server. FH hosted at least 400. That's the number I've seen quoted. The evidence that FH admin was also the Tormail admin, or at least that Tormail was hosted on the FH server, is that both web sites served the same exploit at the same time and then went offline at the same time. The evidence that Eric Marques is the FH / Tormail admin is that he was arrested and described by an FBI agent as being "the largest facilitator of child porn on the planet", and that happened around the same time as the exploit and FH / Tormail / all those cp sites going offline. It's circumstantial evidence, of course, but I'd say it's pretty good evidence. FH certainly had one of the largest caches of child porn on the planet, if not the largest, so there aren't too many other things that FBI agent could have been talking about.