You've been trying to ignore Google+. Many of us have. After all, who needs another social network? Apparently, a lot of people. New numbers from Compete measuring U.S. unique visitors on social networks in June 2012 show Google+ reaching 31.9 million in June. That's an increase of 43% compared to May 2012. In the States, Google+ is now bigger than LinkedIn. MySpace visitors drop 8% to 21.9 million.