Reading further it's interesting that RAIDERS didn't do great in Japan, possibly because the marketing focused on the Spielberg/Lucas colloboration, with one of the posters largely featuring a B & W picture of them on set while pics from the actual movie were pushed to the side and much tinier.
Also interesting that in some way's Lucas's notes/rewrites of some parts of Kasdan's version actually improved things a bit, with him eventually making the Emperor/Vader less adversarial to each other.