Twitter Users Issue 600 Tweets Per Second That's 50M Tweets a day By Nick McMaster, Newser Staff Posted Feb 23, 2010 2:09 PM CST 0 comments Comments In this screen shot taken from Twitter, the Twitter page of astronaut Timothy (TJ) Creamer is shown. (AP Photo/Twitter) (Newser) – Twitter is expanding rapidly: the site now hosts 50 million Tweets every day, or about 600 every second. Twitter announced its latest figures this week, and though it did not disclose how many users it has, it drew about 75 million unique visitors last month, PC World reports. The site's growth has been extraordinary: just 2 years ago, it had 300,000 Tweets a day. The new stats didn't factor in spam.