I think its more analogous to your water/waste company who you pay monthly for them to remove your waste from your house. The provide an ongoing service, you d

I think its more analogous to your water/waste company who you pay monthly for them to remove your waste from your house. The provide an ongoing service, you don't get to pay a one time fee for it. Subscriptions provide a way for apps that have an ongoing support component to be paid for that instead of using ads.