I think Webflow is great. I'd love to use it, but...
I'm a backend developer, not a designer so I don't make my living designing front ends for sites on an ongoing basis.
I probably design a new frontend once or twice a year and most of the work is done after a few days. So a monthly subscription to use it sporadically would be very perverse.
I'd love to be able to pay per use, e.g. design a site, then pay when done.
Have you considered such an option? I'd image there are lots of developers out there in a similar situation.