The majority of the time...this is the beginning of the end. I don’t know if it’s because the developer gets bored with an app, or what. But, it seems they experiment with the subscription model, to see if it’s still worth their time. The app development still slows. Subscribers cancel. Development stops.I’d be embarrassed if I made issue with a $20 per year subscription fee. Developers have to keep the money rolling in to make money to improve the product. Photo editing apps are not like games that have gazillions of players.
Some developers keep promising a big update...loyal customers keep hanging in there. But, the big update never comes. Subscribers feel duped. That's why people balk at subscriptions. No reason to be embarrassed for being smart, and learning from one's mistake.
My point is...as this subscription model grows, people will only keep subscriptions to apps they really love. This will seriously limit a developer’s subscriber numbers if they don’t work hard on app development.
It’s a vicious cycle.