While reading his wiki page it says that: Running alongside his enthusiasm for DVD, Scott is sometimes considered the "father" of the director's cut, though the impetus to produce such versions has sometimes begun with other parties. The positive reaction to the Blade Runner Director's Cut encouraged Scott to re-cut several movies that were a disappointment at the time of their release (including Legend and Kingdom of Heaven). Today the practice of alternative cuts is more commonplace, though often as a way to make a film stand out in the DVD marketplace by adding new material.
Blade Runner was his first Director's cut but he has made many since. It seems he has the most Director's Cut Editions. Also it seems that he does a lot of Director Cut because his movies are changed by studio input after test screenings. So does his making of so many Director's Cut actually hurt the movies ( since the original movie is no longer the definitive version) or help them by creating more layers?