I haven’t seen my class of app discussed here. In my case, a mobile app is useful for a subset of features of my web app, but it would never replace to full experience. Very few customers would ever think to look for my app in the App Store. Nonetheless Apple wanted to force me to offer the subscription through the App and then take a 30% cut forever. I ended up just releasing an Android version as they were more lax about not including any payment option. I could see this opening up the option for a lot of business apps that augment functionality elsewhere.