Steven Spielberg still makes a fortune from Star Wars because he and George Lucas bet on it's success!
In 1977, Lucas had finished producing Star Wars and went to Alabama where Spielberg was shooting Close Encounters of the Third Kind.
Lucas was depressed and told Spielberg that Star Wars did not live up to his vision and thought he just made a kids’ movie.In a move to make some extra money after Star Wars, Lucas proposed that each director give 2.5% of their movie’s profits to the other.
Fortunately, Close Encounters got Lucas money and saved Columbia movie studios from bankruptcy. However, it was better for Spielberg. He still receives tons of money constantly from Star Wars merchandise, DVDs, and re-releases!