Millionaires are taking to social media in surprising numbers—especially to Facebook.

Three-fourths of millionaires in a Spectrem Group survey said they use social media. The wealth research firm said 57 percent of the 1,300 millionaires in the poll responded that they use Facebook, while 41 percent use LinkedIn and 10 percent use Twitter.

"The wealthy are using social media at almost the same rates as the nonwealthy," said George Walper, Spectrem's president. 

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