I believe the expotential growth to be a myth. 3 months is the the peak.
FIRST MONTH: Trial to Membership
SECOND MONTH: Surfer sees a rebill on his credit card
THIRD and final MONTH: Surfer cancelled his membership after the saw the rebill of the second month.
Sure you are going to get some people who never look at their credit card bills, or enjoy being a member of a site, but it's not going to last for much longer than 3 months.
However, I pushed a celeb program about a year ago...got one signup. I dumped the program because of the poor ratio.
That one signup has recurred for a complete year now. Not bad for one signup
