I would like to see it in action. Can you PM me the url of an example? (possibly your forum or a big forum.) The main problem with free solutions is their scalability. Is Zoints SEO scalable enough?
we have found google adwords the best way to get members to our site, and also offering incentives for posting, such as users get paid to post, and adsense revenue sharing where users who start new topics earn revenue via adsense. it is working well.