It depends what type of traffic you buy and where you send it. In general, I've had good experience with Choker. They have a nice admin interface too. My experience with Sex.com has been poor.
In referring to me, Joesho is probably referring to the possibility of buying text links or banner display advertising on two sites that I sell ads on. One of them is
http://www.smutdrs.com, which is in my sig, and the other is
http://www.ratexpics.com.
A couple of other sites that come to mind that have worked well for me are
http://www.consumptionjunction.com and
http://www.collegehumor.com.