You may have heard of Qassia. Qassia is not your average directory. It is a fully automated cascading directory coupled to an intelligence engine. You can get unlimited backlinks for free. Qassia came out of beta on August 26, 2008, so you can now head on over to the site and sign up. Lifetime membership is still free, for now. Sign up here. Feel free to post questions in this thread.
I wouldn't want to add a code on my site for that. I think a simple CAPTCHA would work as t already annoys many of us.
No, the site authentication is essential and captcha doesn't address the issue, which is people passing affiliate links off as websites. An affiliate link is not a website, and authentication is the only way to prevent affiliate links going into our site. The only other way of preventing affiliate links is manually approving submissions. This is a problematic process because it requires human intervention. Our system is fully automated, and your sites appear in our index as soon as you authenticate your site. Site authentication makes sure the sites in our index are of high quality. And it is easy to do, it is fast, and it allows instantaneous automated approval.