On one hand this seems a black box tracking device and in invasion of privacy, with even less control than we have on out other such trackers, eg. our mobile ph

On one hand this seems a black box tracking device and in invasion of privacy, with even less control than we have on out other such trackers, eg. our mobile phones. On the other hand: why? Modern phones have NFC and Apple/Google pay. An ordinary NFC bank card can be a nice backup, with no need for tracking actually. Also: I wont keep reading... if you happened to answer there questions behind the subscribe-wall.