It makes me much more willing to trial a subscription service because I know I won't have to spend an hour of my life on the phone with a lovely Filipino man to stop that service.
The killer app for me on iPhone? Files. I literally switched from iPhone 3 to android because it didn’t have a file manager! Thankfully I came back.
It is one reason that with this switch allowing apps to send me outside of Apple's Ecosystem to subscribe, I hope that developers realize that if they make this the only option there are likely many people like myself that just won't subscribe to your app. I am far more likely to try a subscription that costs a couple dollars a month if it is through the app store instead of through some random website.