I understand that you don't want a brand like ms. Fields cockies next to a gangbang, but that is soley for ads that promote brand adwareness -- those that directly sell products could properly advertise on porn sites with little risk. I doubt anybody will discount bingocardcreator because Patio11 got a great deal on ads.

(In fact people are known to be less rational when turned on, so it might make sense to put less "need to have products" closer to the porn).