In this case, it seems like it’s the app makers themselves who are requiring the Play Store, though. Unless I’m misreading this, the developers are using the Integrity API to determine if the app was installed through “official channels” (in this case, the Play Store). Feels like people should be upset at the companies behind the apps, here.
There’s quite a few retail stores that don’t keep inventory, even for common things. Staples comes to mind, where it feels like half their damn office items aren’t in stock, so you need to wait for them to have it brought in.
The problem is that those same retail stores can’t compete with Amazon’s shipping speed. It becomes a case of:
It’s alright if they don’t want to carry inventory, but they need to have the shipping speeds to compete, otherwise there’s no reason for the consumer not to just buy it off of Amazon directly.