Also, 250 million of the 750 million actives are mobile users, and those are much more unlikely to be fake. ref: https://www.facebook.com/press/info.php?statistics

I still find some pets and companies using profiles, but most of these are pages these days (since there really aren't advantages to making a profile vs. a page for them), and there is a process for converting these to pages - https://www.facebook.com/help/?page=18918 - and it is the way to reactivate a non-human account that is reported.