Gregory's Server
I'd make a one-time payment, if it weren't for the narrow focus and "useful but not for everyone", which makes it unlikely I could hope for the number of users. But I also don't know how best to balance the subscription so that it's fair and seen as an investment in case the worst happens, rather than something useless which suck money from the pocket.
What are your thoughts on this?
There is no sense in doing it for free: the project will not last long, and I will cut it to save on costs and to extend it myself when the pressure is on.
The obvious profit in this case is seen in paranoid people, conscious seniors and activists. They have much greater risks of getting a useful action in the shortest possible time and saving money on a short subscription.