The limited edition aspect of the set includes an 80-page artbook and Artcard featuring all-new original character art by anime character designer.
The limited edition set is priced at $84.98 and the on-disc extras for it (and the regular edition) includes a commentary, the shorts, promos, commercials, and the clean opening and closing sequences.
Funimation just brought out the first season of Golden Kamuy as a DVD/BD release on April 2nd, 2019, but promotion continues on.