Pinterest is responsible for 3.6% of all Internet referral traffic -- more than YouTube, Google+ and LinkedIn combined -- according to Shareaholic's latest monthly traffic report. Still, some analysts say the network isn't ready for prime time. "There's no denying that Pinterest is fun, looks great, and a lot of people love playing with it. That is also true of kittens but no one's rushing to include them in their 2012 marketing plans," Darika Ahrens writes.
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