Independent research shows 10 million Weibo users generate nearly all the original content . Weibo will launch IPO putting the company at a value of $ 3.9 billion . For example , a mobile user commonly keeps the app in 'logged in ' state but indeed has no usage at all . ` Researcher says Weibo 's definition of `` active use '' is debatable . Comment:
Independent research shows 10 million Weibo users generate nearly all the original content . Weibo will launch IPO putting the company at a value of $ 3.9 billion . Researcher says Weibo 's definition of `` active use '' is debatable . Comment: