I tried it once by building and submitting a bunch of freesites before the big day.
I did get a sale on that day but I put the wrong link up
But it rebilled yesterday and that's 30% of the 100.00 sign up. So if the surfer rebills another 5 times I'm cool.
Anyway I dont play games with contests after that.
I'll just stick with the tried and true and that's "Revshare"