>"Huh, why would they need to?" Because by doing so they are able to compile additional information about people, data that's not available to them via online

>"Huh, why would they need to?" Because by doing so they are able to compile additional information about people, data that's not available to them via online tracking. See: https://www.propublica.org/article/facebook-doesnt-tell-users-everything-it-really-knows-about-them https://www.propublica.org/article/facebook-doesnt-tell-user...