Hey Chubster
I'd suggest you make a bunch of feeder sites that mainly promote paysites, like the other stuff you've seen listed, and then have a couple of links on each of these sites to
http://thesexbox.biz/.
This isn't really the business of giving away free porn, so if you're making free sites to promote a free site, you're probably not going to make any money.
Good Luck!
Matt