These sites are similar to autosurfs. BUT force you to manual click on a number in order to continue the surf. So these are technically manual surfs, and force people to view your site in a way. I was wondering if anyone has had any success in sales with these sites.
They may not convert well because the visitors are also webmasters / advertisers / affiliates like you wishing to promote their site rather than purchasing something!
Don't bother with these sites, the members there are sellers like yourself, so who's gonna buy? Plus you need to spend time clicking on the ads and it's almost guaranteed that no one will look at them. Everybody's just clicking away hoping to build up enough credits so their own ads will be shown (no doubt to members who will also not look at the ads) and it goes on and on and on.... a vicious cycle. You're better off with PPC.