They’ve always been shoddy in their treatment of affiliates and for that reason most of the really big sports betting affiliates don’t promote them. And if the likes of Gooners Guide and Oddschecker don’t promote them, then it’s reasonable to assume they’re not worth promoting.
I don’t want to get into my own experiences with them, but let’s leave it at …. there are plenty of bookmakers that will pay and Jens from BonusTip mentioned several in his post.