User numbers of largest social networks in February 2011 (fee-based)

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This statistic ranks the largest social networks worldwide based on the number of users per day in February 2011 (in millions). During that month, Facebook had an average of 310 million unique visitors per day, approximately six times the amount of daily unique visitors of the second-largest social network, Orkut. Orkut is one of the most visited social networks in Latin America.