I’m curious about how they make use of their knowledge of multiple accounts. In Chrome and the Gmail app they definitely understand that these x accounts belong to the same person, and I imagine there’s some kind of Uber-profile on me.
At the beginning they actively discouraged these, but in the end they gave up and make multiple personal profiles supported. Of course the have our uber-profile, after all, I situations where multiple Gmail accounts in one phone are shared by different people must be extremely rare. So I guess they embraced it and try to learn more about the user by analyzing how these different accounts are used.
Whether or not they use it for aggregate tracking, it's necessary for fraud detection. Creating a thousand ghost accounts to multiply the force of an attack via (or upon) Google services is "black hat 101."
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At the beginning they actively discouraged these, but in the end they gave up and make multiple personal profiles supported. Of course the have our uber-profile, after all, I situations where multiple Gmail accounts in one phone are shared by different people must be extremely rare. So I guess they embraced it and try to learn more about the user by analyzing how these different accounts are used.
Whether or not they use it for aggregate tracking, it's necessary for fraud detection. Creating a thousand ghost accounts to multiply the force of an attack via (or upon) Google services is "black hat 101."