They don’t need to know 100% of users. Being the default is more than enough to encourage a LOT of users to opt in and engage with their mapping, music, and store experiences. You don’t have to be one of those users if you don’t want.
Hell, even anonymous map data is still valuable to them. A totally anonymous user can still inform a mapping service about traffic, detours, and where maps need to be revised.
They know who you are. I’m sure of it. Google doesn’t develop these products out of charity.
They don’t need to know 100% of users. Being the default is more than enough to encourage a LOT of users to opt in and engage with their mapping, music, and store experiences. You don’t have to be one of those users if you don’t want.
Hell, even anonymous map data is still valuable to them. A totally anonymous user can still inform a mapping service about traffic, detours, and where maps need to be revised.