I think I see the ads in the left-hand margin (the dating/etc site ads) when I'm not logged-on. (I thought it was kind of funny actually, because on top of the ad it said something like "Forum Members". I thought "Geez, the members of this forum are pretty nice looking!")
I don't see the ads on my main computer because it automatically logs me in when I open crappie.com.
Whether I'm logged in or not, I do see a square ad on the right-hand side of the first post on a page. Amazing how the ad is always selling something I've recent searched for.
I'm not a sponsor or such.