> why the fuck do I need some shitty app to use your charger?
I have PHEV that doesn't pull much from a charger, and I usually don't use chargers for money, but... When I charged for fun while I was shopping at a grocery store, it ended up being like a 70 cent charge. If you bill 70 cents to a credit card, it doesn't make sense. Tieing it to an app, you can either charge more and have me loan you the balance, or you can wait until I acrue enough debt that it's economic to charge me.
With full EVs, they can usually pull enough current to reach a billable amount in a short time, but aggregating charges may still be useful.