I'm giving away free credits on www.membergenerator.com -- where you have the ability to pay users to sign up on your website. You can be running a regular free registration site, or a forum (and can require that users post a certain # of times). I'm giving away 1 credit for free to up to 30 users that reply to this thread. All you have to do is:
1. sign up on www.membergenerator.com
2. pm me your user id
3. once you receive your credit, post an offer for users to sign up on
With 1 credit, you can have up to 20 people sign up on your website (at .05 credits per sign up)!
The website has over 160 users ready to sign up on your website, and it is only a week old, so sign up and PM me now to get users on your website right away!