There is a big (and in this case very significative) difference between edits and links. Edits are always internal. They take you somewhere else inside the movie (which means the author retains control of the whole). But links may take you somewhere else outside the site (which means the author loses control of the whole). To make edits and links relate more closely you would need edits that can take you to a different movie. I guess that would be very interesting. :-)
exactly :) and it's a wonderful question.
i'll return to the problem of external links in another post.