China's top three social networking service (SNS) sites, Renren.com, Kaixin001.com and Campus.qq.com, controlled almost 68% of visitor throughput in 2009, a CNZZ report has revealed. In 2008, when SNS was a rarity in the country, the top 3 and top 10 websites attracted 47.59% and 73.63% of the total visits. The percentages shot up to 67.57% and 87.7% last year, added the report.