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Re:Facebook has 1 billion monthly active users by tsycho on Thursday October 04, 2012 @02:10PM (#4613545)
For the same reason as clicking a +1 somewhere doesn't make you an active G+ user.
Re:Facebook has 1 billion monthly active users by whatusername on Thursday October 04, 2012 @11:40PM (#4615576)
To my mind it does. I'm contributing something to G+

But I think that to Google - the fact I log into GMAIL makes me an active G+ user.