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They already have your username. You logged into the app. What other level of fingerprinting to do they need?



I meant if they gave away all of this data about your device then someone on a different app could identify you by comparing.


That’s one misconception (or misnomer) about Facebook and Google. They don’t “sell or give away your data”. They sell access to you based on your data. The distinction is important if we want to pass laws limiting what they can do with your data. If there was a law passed saying they couldn’t “share your data” they would just shrug.


Correct which is why I said "in theory"




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