It would be interesting to know how Dropbox is doing. http://dropbox.com/ http://dropbox.com/ shows nothing but their logo, a big play button (with “Watch a Vid

It would be interesting to know how Dropbox is doing. http://dropbox.com/ http://dropbox.com/ shows nothing but their logo, a big play button (with “Watch a Video” as a caption) and a big blue “Download Dropbox” button. No explanation beyond the video (more than two minutes runtime), not even a hint at what Dropbox is doing on that page. You have to click if you want to know what Dropbox is. Did they test that? Does it work because it is hard to concisely describe all the strengths of Dropbox? Maybe it works because the main vector for the recruitment of users are invitation emails which do include a short description of Dropbox?