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A comment on How Eduardo Saverin sold Facebook ads in 2004 (2012). Parent comment

Re:How Eduardo Saverin sold Facebook ads in 2004 (2012) by eberkund on Monday June 01, 2020 @05:59PM (#23384473)
Most of the info is not publicly available but collected by inferring information about based on the pages you visit, who you talk and which other users you associate with.
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Re:How Eduardo Saverin sold Facebook ads in 2004 (2012) by heromal on Monday June 01, 2020 @11:25PM (#23387082)
That's... Public info.
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Re:How Eduardo Saverin sold Facebook ads in 2004 (2012) by Fezzik on Tuesday June 02, 2020 @03:07AM (#23388448)
I think that is in reference to Facebook mining your DMs and web searches, neither of which are viewable to your FB friends or other internet users at large. FB accesses any and everything they can regarding your browsing behavior and ends up with far more data about a user than what is displayed publicly on the user’s public profile.
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