[CamelRocketFish]

Subscriptions for apps are like paying the service fee to a skilled mechanic for your car's maintenance and upgrades. The developer acts as the mechanic, using the subscription revenue to continually improve the app's performance, security, and features. Just as the mechanic ensures your car runs smoothly and can add better features (tinted windows, reverse camera etc), the developer can deliver regular updates, replace outdated components, and introduce innovative features. Subscriptions support ongoing app maintenance and enhancement, providing users with a reliable and up-to-date experience, similar to how a mechanic's services keep your car in optimal condition.

[zoover2020]

That's a lot of fluff for meaning to say that subscriptions earn more than one-time purchase fees.

[thunkshift1]

How often do you pay your mechanic

[8note]

Once per maintenance change, not once per car you buy