Remember Facebook Questions? While it lives on as light hearted polls and quizzes it was originally launched by D’Angelo when he was an FB employee. It was designed to compete with expert Q&A websites and was basically Quora v0.

When D’Angelo didn’t get any traction with it he jumped ship and launched his own competitor instead. Kind of a live wire imho.

https://en.wikipedia.org/wiki/List_of_Facebook_features#Face...