Might be a good idea, creating a teaser area on your site.
Just call it a "basic" membership, make it cost like $5 a month for those that sign up to it, and post passwords to it on the password boards.
Then, put a small amount of good content in it, and combine that with lotsa preview to the main site (for instance, a movie site would show everything seen on the normal site, including thumbnails to the movies, except the actual movies),
Password traffic converts better than most other traffic
