As far as using PPC as an affiliate. I tried ero-advertising and AVN ADs with no luck - AVN ADs played their ads for months before approving my site and counting my hits. Black Label Ads is getting me a riduclous trickle of tiny, tiny amounts of money - maybe $100 in 5-6 months! I generally put an affiliate on the back burner if I don't see at least $100 a month.
If you're looking to use PPC to advertise your site: My sites sell banner ads at the low, low, low price of .02 a click. Check out
http://www.weirdandsexy.com and
http://www.deadlyamazons.com .