Which gaming company first implemented blockchain technology for verifiable ownership of in-game items, allowing players to truly 'own' their virtual goods?

The gaming industry has transformed how virtual goods are bought and sold, creating entirely new retail ecosystems within digital worlds. From cosmetic skins to powerful in-game items, virtual marketplaces now generate billions in revenue annually. This poll tests your knowledge about a pivotal technological advancement that revolutionized how gamers purchase and trade virtual goods in one of gaming's most popular titles.

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Valve Corporation (Steam) with Counter-Strike: Global Offensive's skin marketplace
Epic Games with Fortnite's V-Bucks economy
Axie Infinity by Sky Mavis, using Ethereum-based NFTs for digital pets and land ownership
Blizzard Entertainment with World of Warcraft's auction house system