In some ways, I'm somewhat boggled. That just users on Twitter, after all. And nearly 2500 clicks is a pretty big number.
On the other hand, that's less than a hundred clicks per day. From 167 "followers". So someone's not pulling their weight :->
Oh, and that includes people clicking on retweets, which is where I think the highest number of clicks come from.
"Direct" in the left-hand pie chart means "from an app that doesn't send info about what it is." The orange slice just above Twitter.com is Tweetdeck.