There are a few ads, I disabled my ad blocker for this site. Don't know if it helps or not but you know There's also a donate option but again I don't know where that money goes. As for how much, if it's been done efficiently it wouldn't cost too much now to run, probably a fraction of what it was 10 years ago but there's still quite a lot of information stored on here.
Didn't know that. Turned it off too then. I'd hate to see this place go to away.