Keep in mind though that that $15 was for taking 9th in a tournament with about 1780 runners and playing for about 3.25 hours, so in comparison to something like a $2 buy-in tournament on a regular site, its a terrible payout.
I hit for $15 last night and I've only been on the site for 10 days and haven't played poker at all in the 3 years prior. If you are looking for small stakes tournaments, it's not awful, as it seems pretty easy to at least make your subscription fee up if you aren't a complete idiot.
If you are looking for interesting ring games, it's total trash, as the ring games are play money only and there are no prizes to be had there. Depending on what your goals are, it can be 'okay' or it'll be a total waste.