I know of non-technical friends and family who use: dropbox, pandora, rdio, one or two w/ 37 signals products. I think many of them would pay for mint. Can't

I know of non-technical friends and family who use: dropbox, pandora, rdio, one or two w/ 37 signals products. I think many of them would pay for mint. Can't think of too many others. I agree that people prefer the "buy once" option. Which sucks, because then it doesn't align the developers' interests of new revenue with getting updates pushed out to old users. Retraining users is difficult. Your best bet may be to calculate your estimated product life cycle, charge that much up front, then giving them access for that amount of time.