They do have an ad sales force. http://bits.blogs.nytimes.com/2010/08/24/new-hires-at-twitter-put-the-focus-on-making-money/?dbk http://bits.blogs.nytimes.com/2

They do have an ad sales force. http://bits.blogs.nytimes.com/2010/08/24/new-hires-at-twitter-put-the-focus-on-making-money/?dbk http://bits.blogs.nytimes.com/2010/08/24/new-hires-at-twitte...