Actually, the GWW Community Project Lee had us doing (and still needs finished) is a good method for filtering your traffic. At its most base definition, as I understand it to be, it's how you move your traffic around through the links they click to eventually direct them to the type of porn they're looking for ... and making sure it's YOUR site, or a sponsor you're affiliated with, link that gets them there.

Someone may arrive on one of your free sites for gay military, but with various links to "other" types of porn that you provide, or even on exit consoles, the surfer is really hunting for hairy bears and those that finally hit the link to tour your hairy bear paysite or AVS are considered "filtered" traffic.

If I'm off base here, by all means, someone jump in here and clarify!