I think it s an important question - but hard to answer in this general way you are asking it.
I always wanted to set up a prepaid, “pay per use” setting for some powerful tools - but i never found a suitable licensing solution.
Most stuff I do is for long-time customers, i try to make them happy with powerful tools, so they ask me again if they have the next challenge.
but I think to answer your question - it really depends on the topic / your customers / the tools you offer - you re webpage is not linked in your profile…
more about the technical issues - see this older topic: