I also had a lot of trouble with the mandatory notification banner when I was making app clips for local art galleries. App clips could support one-time uses, but this mandatory banner notification sends users off to the App Store prematurely. This confused a lot of our users and interrupted what would've been an enjoyable art appreciation experience. We've basically been forced to advertise ourselves instead of focusing on the gallery's art. It is awkward to ask users to download an app for something they'll never use again. App Banners should be optional for developers to include; we shouldn't force them onto our users if it causes confusion. Once this issue is fixed, App Clips could be used in many new and exciting ways – fun one-time in-person experiences, immersive digital advertisements, etc. I hope Apple is reading these and understands that we also want the best for the Apple ecosystem and that the adoption of App Clips is being limited by a very minor change.