Twitter COO Dick Costolo announced that Twitter now has 190 million users, who are sending out 65 million tweets each day. The remarks were made at the June 7 Conversational Media Summit, and reported by TechCrunch. Twitter reported in April that it had 180 million unique visitors, while it said in February that users were sending 50 million tweets per day.
Costolo added that some of the advertisers testing the company’s new Promoted Tweets service are seeing average engagement rates of 2.5%, based on the number of replies, retweets and click-throughs the promotional tweets receive.
The TechCrunch story provides additional details and analysis: http://techcrunch.com/2010/06/08/twitter-190-million-users