qxxx,
If you promote the "monthly option" then you get $50-$55 for each sale you make. It is not recurring, and you would not have to wait for the surfer to stay in order to get credit. You would receive credit for the sale as soon as the surfer signed up for the monthly membership. As far as which option is better, I think it is a personal preference, and dependent on the traffic that you send.
If you have any other questions you can always get them answered at
[email protected] .