Which gaming platform pioneered the 'community marketplace' model that allows players to create, sell, and purchase virtual items with real-world value?

In the rapidly evolving gaming industry, virtual marketplaces have transformed how gamers purchase, trade, and interact with digital items. These platforms have created entire economies within games, with some virtual items selling for thousands of real-world dollars. Test your knowledge about the innovative retail strategies that have shaped the virtual goods economy and changed how developers monetize gaming experiences.

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Steam (with its Steam Community Market)
Epic Games Store (with its Creator Marketplace)
Roblox (with its Robux Marketplace)
PlayStation Store (with its PS Plus Collection Market)