I think the underlying sentiment is that you've bought the device, so you should be able to do whatever you want with it. And there's no technical reason that y

I think the underlying sentiment is that you've bought the device, so you should be able to do whatever you want with it. And there's no technical reason that your choice of device should preclude other stores. For a more meatspace example let's say you own a car with full self-driving capabilities. Now, the manufacturer of that car also runs a chain of grocery stores. It would be problematic if the car refused to drive too a different store. "If you've already to decided to buy a Walmart car then Walmart is the only store that you can go to."