If your links point to cumfiesta, but the content is watermarked say first time auditions...then yes you will most probably have problems. Even though they are both nasty dollars, and yes you get access to both by subscribing to either. But you are promoting one site with anothers content
But if you specifically promote their
All Site Access using content from one of the sites they get you will probably have no problem.
I say probably no problem except for the fact that many Link Lists will very seldom accept sponsor content, and a few specifically do not accept Nasty Dollars in their rules.
So what is so hard to understand about it?