I would be much happier paying to upgrade on my own terms than being held hostage every month with subscription fees. Subscriptions add up fast and for most things if the app is good enough now I don't care too much about continuing support.
And even if subscriptions are small, the hassle of tracking them adds up fast too, because each subscription is an unnecessary relationship with a third party, a relationship I don't want to have. When I buy bread, I don't enter into a relationship with the baker or the supermarket. I want the same to be true of software.
I refuse to use them, even when it pushes me back to the default apps that came with the device.