Holy fuck. What a crooked thing to do to anyone, even you
If you are using their content you may have no choice if they ask you to. Next time filter through an FPA so you can swap out links and sponsors can't force you to delete galleries they don't know about. All they will see in referal logs is your FPA. Done right it can even increase sales.
Hell, take it one step further and do what I described in this article at
http://www.adult-site-traffic.com/ad...pulation.shtml so you can still make money if they shitcan your account. Multiple sponsors can work in this method if you have a brain of your own which I know you do.