I understand the call of money but I cannot help but feel very negatively towards academics doing this with facebook of all organisations. After recent events, they cannot pretend not to know the impact and damage their work may have here. Excusing yourself with "I am just a researcher, I don't have anything to do with how my work is used" is just not good enough any more.
I would categorically reject any collaborations with FB as an academic in ML.
I would categorically reject any collaborations with FB as an academic in ML.