Look at your affiliate agreement -- most agreements of this sort limit the affiliate to use "authorized" promotional tools (images included).

This is the problem with affiliate produced promotional images of performers usage.

While cam sites have copyright to broadcast and model uploaded image's copyright assignments are usually in absolute form -- the site policy may be to remove a former model's images on request as a courtesy and not as a legal duty.

This is where an affiliate's unauthorized use of images might become a problem. But an affiliate has no real legal liability to the model to remove said images -- they should be removed as a courtesy -- it's is not important enough to get into a shouting match over IMHO.

In the normal course of business we would remove the images requested by the ex-model that affiliates could access thus saving everyone the hassles as indicated. Hot linking of cam model images is recommended as they could be updated or deleted for you.