Ask HN: Will Socialcam and Viddy have more users than Instagram soon ?

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http://www.appdata.com/apps/facebook/125119214225766-viddy http://www.appdata.com/apps/facebook/124024574287414-instagram http://www.appdata.com/apps/facebook/150768931647055-socialcam

Viddy has already more users connected to facebook than Instagram (14.7 Millions) and Socialcam is on track to do the same. How come this two apps(Viddy and Socialcam) have added millions of users during the same period ( starting april 24 th)

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