Did you consider adding an option for a one time purchase? I really don't like re-occuring subscriptions if I can at all avoid them, but I'd happily buy something like this (like I payed for sublime, etc).
For a short time I had a lifetime membership option for $100 and then later at $150. It even had a few takers. But I removed it mainly because:
1. It feels strange to promise to provide an ongoing service for a one-off payment (I'm guessing Sublime Text doesn't have a server component, there's a big difference there). It sounds risky from my point of view. Am I still obliged to keep providing you the service in 20 years even though you only paid once?
2. The people willing to pay up-front are probably the ones most likely to stick around for the long term and provide a lot of recurring revenue. (Hypothesis - may not be true.)
3. More one-off payments makes my revenue graph much spiker and less predictable.
That said - perhaps you're right. If people are much more willing to pay up front I should trade some of the predictability of SaaS for the lucrative but volatile one-off payments. Something to consider when I revisit pricing.
