Subscription models only make sense for an app/service that have recurring costs. In the case of Lemmy apps, the instances are the ones with recurring hosting costs, not the apps.
If an app doesn’t have recurring hosting costs, it only makes sense to have one up front payment and then maybe in app purchases to pay for new features going forward
I think there’s something wrong with lemmy.world, this is the post. The developer posts to confirm the tracking is turned off. Sorry the direct link didn’t work.
https://lemmy.world/post/2538321
Edit: a federated comment link: https://programming.dev/comment/1561763