As a member of the Twitter analytics team, part of my job is to measure and understand growth. The graph above tells a story of how we’ve grown over the past three years in terms of number of tweets created per day. Please note that tweets from accounts identified as spam have been removed so the counts in this chart do not include spam. Folks were tweeting 5,000 times a day in 2007. By 2008, that number was 300,000, and by 2009 it had grown to 2.5 million per day. Tweets grew 1,400% last year to 35 million per day. Today, we are seeing 50 million tweets per day—that’s an average of 600 tweets per second. (Yes, we have TPS reports.) Tweet deliveries are a much higher number because once created, tweets must be delivered to multiple…