I've heard that Facebook create ghost profiles based on things like known contacts (contact sync by a user) of users, so probably. What they'd use that for is l

I've heard that Facebook create ghost profiles based on things like known contacts (contact sync by a user) of users, so probably. What they'd use that for is less clear, although I assume their legitimate reason is for making better recommendations to new users and maximising early engagement (I seem to recall they have research papers on that topic).