Ian Boudreau at PC Game N reports that Rian Johnson has slipped into The Last Jedi a reference from the Infocom classic Zork.
Johnson says he placed a coin that came with Zork Trilogy in one of the movie’s casino scenes. When Infocom released the Zork Trilogy in 1987, they had a special copper Zorkmid coin struck to include with each boxed copy as collector’s items.
It would appear that Rian Johnson kept his and was the inspiration for one of the coins Benicio del Toro’s character DJ pockets during a scene in the casino, Canto Blight.