Twitter’s user growth per day
Here is a companion to the Twitter user population growth chart from last week. This chart shows an estimate of the number of new users per day. The dashed blue bar is the 2009 US inauguration of Barack Obama, and the extreme spike is the Oprah Winfrey show featuring Twitter.
The data used for this chart isn’t as complete for the last week or so at the right hand edge, i.e. the rate of new user signups hasn’t gone to zero, and in fact remains quite high, not 100k users per day, but well above the “pre-mainstream adoption” user signup rates, in the range of 30-50K users/day. As of mid June, Twitter has more than 8M user accounts that have been created.