I haven't used it because it looks like any other AVS to me, except I have less control. As a site owner I'd risk losing all my traffic and income to other sites. I only get paid if they come back to my site, even if it was my member.
Adult Verifier Ultra for example is a more attractive solution in my opinion so far.
http://www.adultverifier.com/av/ultrawebmaster.php3
You can setup a small paysite and get paid every month.
You can pay out $25 per signup if you want and/or a recurring option (up to 70% I think) to your webmaster affiliates. As a site owner, if you have 1000 members.. you get paid for the 1000 members even if they are now visiting another site more often or browsing only the new sites that are added.