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A comment on Fake “like” factories – how we reverse engineered facebooks user IDs [video]. Parent comment

Re:Fake “like” factories – how we reverse engineered faceboo... by ceejayoz on Monday December 30, 2019 @08:00PM (#21918153)
It's a "Facebook click ID" and it's likely intended to evade Safari's "Intelligent Tracking Prevention" on third-party cookies.
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Re:Fake “like” factories – how we reverse engineered faceboo... by jtbayly on Tuesday December 31, 2019 @11:24AM (#21922145)
This. We knew this was coming when Safari added that.
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