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According to Wooga’s slideshare, less than 3 percent of their users, 70 percent of which are females ages 20 to 60, come from advertising. According to their chart, virality has become less significant as we moved in 2010 and taken a back seat to engagement. Although discovery and invites are important for maintaining a consistent influx of new users, Wooga has focused on leveraging bookmarks and counters.