The forum makes money mostly from advertising at the moment. You'll see on every thread, below the first post, there's a space give to an advertising spot or a special spot (that's normally a quote or a link) - you can click the advertise here link near the disclaimer at the bottom of the ads to find out more information on them.

The forum also makes some money out of charging evil fees for banned ip addresses (such as ones created over tor) and has donator ranks that can be paid for (as well as a copper membership rank too).

Theymos is the main administrator over the forum also now, Satoshi left the forum to them and cobra (afaik) - and cobra recently resigned their control of the forum to Theymos. We've had two admins while I've noticed them here, the first was badbear and the second was cyrus.