Facebook estimates that duplicate accounts may have represented about 10% of its monthly active users (MAUs) globally, for the quarter ended December 31, 2017 (Q4 2017). In other words, about 200 million out of the 2.13 billion MAUs Facebook reported at the end of Q4 2017 are possibly duplicate accounts. While false accounts accounted for about 3-4% of Facebook's MAUs or about 85 million accounts. It's worth noting that Facebook says that the percentage of duplicate accounts is significantly higher in developing countries such as India, Indonesia and the Philippines, whereas false accounts originate more frequently from countries such as Indonesia, Turkey and Vietnam. What is a duplicate or false account? Facebook explains: A duplicate account is one that a user maintains in addition to his or her principal account. We divide "false" accounts into two categories: (1) user-misclassified accounts, where users have created personal profiles for a business, organization, or non-human entity such as a pet (such entities are permitted on Facebook using a Page rather than a personal profile under our terms of service); and (2) undesirable accounts, which represent user profiles that we determine are intended to be used for purposes that violate our terms of service, such as spamming. How does Facebook identify duplicate and false accounts? Duplicate accounts are identified via use of data signals like IP addresses and/or user names. False accounts are identified by looking "for names that appear to be fake or other behavior that appears inauthentic to the reviewers." Note that…
