I really worry about the concept that our webmaster affiliate members are "for life"! I, too, have found serious peaks and valleys with membership revenues.

A steady climb often during the winter months. A couple of months of sustained sales, then a quick drop off, often not to be restored for some time.

I did try an experiment last winter, where I created a member through my affiliate link, and bought $10 of viewing time, on 2-3 occasions. Of course to watch MY movies!!

A couple of months later, that "member" got a promotional e-mail from the company, offering me free minutes. I haven't taken the time to walk through accepting that offer, but I suspect that if I take the company up on the offer, that the member will get switched from my webmaster account, to theirs.