Cnet: At the Ideas Economy: Information 2012 conference, Twitter CEO Dick Costolo revealed that the microblogging service now sees 400 million tweets per day, up from 340 million last month. He added that most Twitter users are mobile, and those mobile users are more active than non-mobile users. In addition, on some days, the service has earned more revenue from its mobile ads than from non-mobile ads.
Costolo reiterated earlier statements about not being concerned about taking the company public. "I just don't worry about that stuff," he said. "If you wait until the business and business results speak for themselves, you can be a public company on your own terms."
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