It's already being sold by other companies. The cat has been out of the bag for years, you're just being notified. Don't attack the messenger.
It's not like these devices have GPS installed, they're reliant on devices around them to do the reporting.
Putting something in someone's car once is a lot easier than putting something in someone's car and then recharging it once every couple of days.
Samsung Trackers might have even more devices than Apple does
Tile
Samsung Trackers work only with some of their phones - there is absolutely no chance in hell that Samsung sold more of those than Apple has sold iphones globally. I'll eat my own hat if they did.