The least they can do is to not load ads on the background. Sure, almost every device does some basic telemetry but showing ads is not something a device does need to function.
Telemetry is not something the device needs to function either. It's a "value add" in the best possible light, security breach in the worst.
Telemetry at least is useful for the developers to see how people use their software/devices/whatever.
Why should a user pay for something that is useful for a multi billion dollar multinational ad company?