The confusion about extra-media compensation arises in that Levitz, while he was DC’s publisher, made it a policy to cut respectable bonus checks to writers and artists, regardless of legal obligation, if elements from any of their stories (even work-for-hire ones) made it into outside media adaptations movies or TV shows. Did you like the scene in Batman Begins where young Bruce Wayne climbs a Himalayan mountain holding a blue flower? Christopher Priest got paid for having come up with that. Or the scene where Bruce Wayne picks out a potential Batmobile from among his own holdings? That was lifted from a Chuck Dixon-written comic, and Paul sent Dixon a check to acknowledge that. Same with dozens of similar moments in cartoons, DVDs, and so forth and so on. It wasn’t legally necessary, it was totally at Paul’s discretion and only Paul knows what math he used to determine what he felt would be fair, but it was a goodwill gesture from an exec sympathetic to the creative community.
And most critically, it wasn’t a written policy or guarantee. It was a .