Here’s are some metrics that should concern those inside of Twitter:

• The number of new users per month is down 20% since its peak in July 2009.
• The average Twitter user has just 27 followers, down from a peak of 42
• 80% of Twitter users have tweeted fewer than 10 times
• The percent of active Twitter users is down to just 17%

The data comes from RJMetrics, which analyzed 2 million tweets from about 50,000 users. You could argue that no data is accurate, unless it comes from Twitter itself, but isn’t it interesting that we never see any of these numbers come from Twitter? You’d think that if the real numbers were more encouraging, Twitter would issue a “State of the Twittersphere”–similar to Technorati’s state of the blogosphere report.

If these numbers are accurate, it shesd some light on why Twitter has chosen to find revenue from Google and Bing, before monetizing its user base. The user base is simply not active enough to generate any significant revenue!

(via)