Thanks for taking the time to explain! I understand that each { follower visits page } is dependent on the { Ashton Kutcher tweets } event, but I still don't u

Thanks for taking the time to explain! I understand that each { follower visits page } is dependent on the { Ashton Kutcher tweets } event, but I still don't understand why events are not independent of each other, and why the N visits to the webpage in time period T from the tweet would not likely be described by a Poisson process. Not expecting an answer btw, just thinking out loud here. :)