More than 83 million Facebook accounts are estimated to be duplicates or fakes, the social networking giant said in a regulatory filing this week.
In the filing, Facebook said there are “inherent challenges in measuring usage of our products across large online and mobile populations around the world.”
The company said there may be people who maintain more than one Facebook account, a violation of its terms of service. It estimates that duplicate accounts represent about 4.8 percent of its 955 million monthly active users as of June 30, which amounts to about 45.84 million accounts.


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