Twitter has many millions of members and is the fastest growing large social networking site in the World. In March 2009, a Nielsen.com blog ranked Twitter as the fastest-growing site in the Member Communities category for February 2009. Twitter had a monthly growth of 1,382 percent, Zimbio of 240 percent, followed by Facebook with an increase of 228 percent. Twitter’s projections for user growth to be 25 million by the end of 2009. By the end of 2010 Twitter expects to be at a $140 million revenue run rate. Twitter projects that by the end of 2013 it will have 1 billion users, $1.54 billion in revenue, 5,200 employees and $111 million in net earnings.