Martin's wealth gap traces directly to timing and leverage: he locked in Game of Thrones at peak cultural saturation in 2011, when HBO was desperate for prestige content and willing to hand over $50M+ just to secure the property. Sanderson, by contrast, arrived at self-publishing in 2022 when the direct-to-fan model was already proven but fragmented. Even his historic $41M Kickstarter—the largest in crowdfunding history—nets him a significantly smaller percentage after fulfillment, manufacturing, and shipping costs than Martin's upfront lump sums from traditional gatekeepers.

The royalty structures also reveal a brutal calculus: Martin's $90M in Game of Thrones book royalties came from a finished trilogy (books 1-5) sold at premium hardcover prices when physical books still dominated, while Sanderson's 60+ million copies are spread across numerous series, formats, and decades of pricing fluctuation. Martin also benefits from ancillary deals—merch, spin-off shows like House of the Dragon, licensing fees—that compound his castle into an empire. Sanderson's Kickstarter, while massive in gross dollars, is front-loaded revenue that must sustain years of fulfillment obligations, not passive income.

Ultimately, Martin monetized scarcity (keeping readers waiting 13 years) while Sanderson monetized abundance (four Stormlight books, novellas, completed series). Hollywood still values the former: an unfinished prestige IP with franchise potential commands higher upfront payments than a prolific author's direct sales, even if those sales are record-breaking. Martin essentially wrote the HBO premium drama playbook; Sanderson is still proving the self-publishing model can scale. Time and incomplete sequels, paradoxically, made Martin richer.