Everyone On The Planet Tweeting? by Chris Trayhorn, Publisher of mThink Blue Book, April 12, 2009 Last week we noted that Twitter was going crazy and that we hadn’t even seen March’s stats yet. Well now we have. Twitter more than doubled its US unique visitors in March. That’s right. Think back to four long weeks ago when you thought that Twitter might have peaked and that everyone you knew had jumped on the bandwagon. Well, now there are twice as many of those people. 9.3 million, in fact. That means Twitter’s growth has accelerated from 33% in January, to 55% in February and now 131% in March. At a growth rate of 131% a month, literally every single person alive on the planet will have a Twitter account by the end of this year. Filed under: Revenue About the Author Chris Trayhorn, Publisher of mThink Blue Book Chris Trayhorn is the Chairman of the Performance Marketing Industry Blue Ribbon Panel and the CEO of mThink.com, a leading online and content marketing agency. He has founded four successful marketing companies in London and San Francisco in the last 15 years, and is currently the founder and publisher of Revenue+Performance magazine, the magazine of the performance marketing industry since 2002.