Today, Facebook unveiled a machine learning tool that, in the last year, has removed more than six billion fake accounts. That's in addition to the millions of new fake accounts that Facebook blocks from being created daily.
https://www.engadget.com/2020/03/04/facebook-reveals-the-ai-tool-it-used-to-ban-6-6-billion-fake-acc/
https://www.engadget.com/2020/03/04/facebook-reveals-the-ai-tool-it-used-to-ban-6-6-billion-fake-acc/