You are wrong about the Sportsbook Group of books. First of all, I dont believe they own BetUSA. I know they are not anyway part of the affiliate program that sportsbook is part of.
Secondly, about them not paying, thats bull. They are one of my top producers, I get paid EVERY month around the 21st and I dont have to request it or change my payment option every other month. These guys are solid.
I think there are still bad feelings about sportingbet, which also owned sportsbook. I know Sportingbet ended their affiliate program, which did suck, but that did not have anything to do with sportsbook and the way they treat their affiliates.
Is your experience with them not paying (sportsbook) first hand, or something you heard or read. I doubt its first hand or you would not have to check to see what other books are in the same affiliate group as sportsbook, you would know that, so your remarks are second hand at best.