Facebook saw the number of U.S. visitors more than double in November 2009 compared to the same month in 2008. The social network had 102.8 million unique visitors in November 2009, making it the largest social network, according to comScore data.
In contrast , the second biggest social network, MySpace, posted a drop in visitors. It had 63.6 million unique visitors in November 2009, down by 16 percent compared to November 2008.
Unique visitors to Twitter soared to 19.4 million during November 2009, an increase of 17.9 million visitors or 1,222 percent compared to the same month in 2008.
|Top Social Networking Sites by Unique Visitors, U.S.|
|Total Internet audience||190,775||201,139||5|
|Social networking audience||134,294||163,732||22|
|Betawave social sites||3,456||13,200||282|
|Windows Live Profile||N/A||11,989||N/A|
|Windows Live People||N/A||2,290||N/A|
|Source: comScore, 2009|