Facebook has <=50M active users in 2021

Created by themusicgod1 on 2016-11-02; known on 2021-01-01; judged wrong by PseudonymousUser on 2021-01-01.

• themusicgod1 estimated 47% on 2016-11-02
• leo_grint estimated 6% on 2016-11-08
• PseudonymousUser estimated 15% on 2016-11-09
• PseudonymousUser   judged this prediction wrong on 2021-01-01.