Twitter is adding 11 accounts per second

The Wall’s Polly Becker reports Twitter is adding 11 accounts per second.

According to Twopchart, the number of Twitter accounts is now up to 465 million registered accounts and it will hit the 500 million landmark on Febraury 25th.

That’s around nine months after it passed the 300 million mark in May of last year…….Twitter passed the 400 million mark in the early autumn and as you might expect that growth has been accelerating. Twitter has effectively grown by more than 65 million accounts since autumn and Twitter wants that to continue as it tries to reach to consumers.

With such growth there is always going to come automated spammers and users who register and do not come back. But, by and large, Twitter users are engaged. Twitter CEO, Dick Costello, reports Twitter had 30% of their monthly active users login every day at the beginning of 2011. By year’s end it was 50%.

Just checking now, Twitter is registering 12.3 users a second. Here’s a chart from twopcharts measuring Twitter’s growth over the last 24 hours.