According to the warrior and wahm forums and Tiff@ny D0w's blog, Iwriter's owner Brad Callen is a low-balling weasel who's driving down writer's pay, and lets clients reject any article for any reason=you play, but they don't have to pay!
Although, come to think of it, it's great as a black-hatter's method for getting free articles--all you want, lol!