We opted out of their licences. We have gone back on occasion to ask for a transactional licence for something that is in their repertoire. They have used an all-or-none approach: if you're not in the licence, in the collective, you're not allowed to do a transactional licence.
Interestingly, that has resulted in our going to different copyright collectives, such as the American Creative Commons, to purchase transactional licences.