and another problem, do this:
http://www.google.com/search?hl=en&q=site%3Apornbb.org
and you will see '584,000 pages indexed by google'
and link love is easy to find when you are giving away everything for free, so alot of their seo work is done by their fans, so when a surfer that is thinking of joining a paysite does a google search on the niche you are promoting, there is becoming a greater and greater chance as the months go by that they will find a siterip forum thread indexed by google just as fast as they find your site in google