you know, I suspect also that youtube sticks vids up on as suggestions willy nilly, or maybe ones that have a lot of views in a short period or something, so it becomes a self fulfilling prophecy sort of thing-building and then more because its building up....who knows. That is kinda funny getting questions from Joe Blow in Panama or something.
Connects with the whole "echo chamber" aspect of facebook etc, but thats a whole other very relevant and serious topic.