“If you logged into our network through social media we also have access to portions of your public social profile, such as your name, email address, and photo.“

Obvious in hindsight, but the profile picture is probably a goldmine for targeted advertising. Not sure if anybody does that but using that for age estimation would probably be way more accurate than the guesses I’ve seen implicitly (lots of ads like “people in <age group> love this product”) and explicitly.