The persistent demand for “unlock all cards” mods sends a clear signal: . Players will tolerate grind only if it teaches skill or reveals novelty. Duel Generation failed to justify its gates—the AI does not scale with your collection, and the booster system is purely random. The ideal solution is a dual-mode game: a “sandbox mode” (all cards) for deck testing, and a “campaign mode” (progression) for collectors. By ignoring this, Konami turned modders into unintended game designers.