Facebook revealed that its previous estimate of 845 million users may have been skewed by the presence of millions of ‘fake’ who accounts.
Facebook acknowledged this week in its filing that somewhere between five to six percent of accounts are either for false personalities or duplicates of other accounts. That’s between 42 million to 51 million fake accounts.
Facebook also stated in its filing that it has over 432 million monthly active mobile users as of December 2011. Here too, the social networking giant also admitted that their data are skewed by mobile apps that regularly “check in” – whether or not the user has actually engaged with Facebook. Facebook says less than 5% of their estimated worldwide DAUs resulted from this type of automatic mobile activity.
Facebook didn’t provide how they came up with the percentage of ‘fake’ users, hopefully, we will hear more regarding that in the future.
Still, one cannot deny the fact that Facebook is still the largest and is growing pretty fast. At the end of 2010, the numbers stood at 608 million overall active users with 374 million active mobile users.
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The event is meant for developers who are interested in learning about the use of Facebook Platform and Open Graph to build social apps for mobile, as well as learn about AT&T’s HTML5 SDKs, and how to use carrier billing to monetize them.
This is the first time “Sponsored Stories” will appear to more than 425 million users who access Facebook through mobile devices like smartphones and tablets, as well as on the logout pages of the 37 million people who sign off the social network each day.

