No idea about rebills but the ratios are quite well, like 1:500 ( I am talking 1st page uniques, they count 2nd page uniques so their ratios look better ) - this may sound bad or average for you, but with other sponsors i convert like 1:800, or 1:1000 with the same traffic.
What I wanted to say, they convert better than some of the other sponsors I am using. :D
Good luck
edited: if you don't mind, you can join them through my ref. link, thanks in advance
SILVER CASH 