Social networking sites gained a lot of eyeball-share last year. The time that users spent on sites like Facebook, Twitter and MySpace nearly doubled in the past year, increasing by 83% relative to April 2008. The number of minutes spent on Facebook by its 200 million active members spiked 700% year-over-year to 13.9 billion. The second most popular social networking site, MySpace, saw a 31% fall in minutes spent on the site to 4.97 billion, but ranked number one in video stream consumption.
Blogger, Tagged and Twitter took the third, fourth and fifth spots. In April 2009, the number of tweets unleashed shot up 3,712% from April 2008.
The missing link? Money.

Boasting a market cap of $19 billion, 

