Look out Facebook, Twitter may be gaining on you. The microblogging service on Tuesday announced it now has more than 200 million active users worldwide, up from 140 million in May. Twitter's growth got a lift from the quadrennial events of the U.S. presidential election and the Summer Olympics, pushing more people from passive to active users.
The service has more than 500 million registered users overall, but most aren’t tweeting away like its most avid users in media and entertainment circles. A comScore report in September found photo-sharing app Instagram had more daily active U.S. users than Twitter. Hardly surprising then that Twitter last week rolled out Instagram-like photo filters among other rich media features it’s added this year to encourage more frequent use.