Number of Twitter Users
How many Twitter users are there?
According to a study by RJMetrics published in January 2010 in Computer World magazine, Twitter users have reached over 75 million by the end of 2009. The study also showed that every month 6.2 million new Twitter user accounts are created. However, a large number of Twitter accounts are inactive, with about 25% having no followers and 40% not having sent a single tweet.