That comment was very relevant, although not 100% true. Facebook does (or at least did) incentivize people to post photos of users who don't have a photo yet, and to "identify" people even if they don't have an account. That's part of their phantom profiles exposed by Max Schrems and friends.
To my knowledge, there is no monetary compensation involved (bounty) though.
To my knowledge, there is no monetary compensation involved (bounty) though.