Oh yeah. I would agree. Once the initial cost of setup is covered, its all profit after that. The heavy lifting is done. I think he does 99% of the work on the site too (moderating, updating) etc... So his labor costs are probably nothing.
He was a great poster here for a while until a few kind of turned him into something he wasn't.
I haven't been there for a while but when i was there it was mainly just him and then the thread they had about this place. That thread was 99.999% of the traffic over there.