Which game first introduced a sophisticated virtual marketplace with real-time supply and demand economics that influenced modern in-game purchasing systems?

The gaming industry has transformed retail experiences through innovative virtual merchandising strategies. In-game purchases and virtual goods have created entirely new revenue streams and shopping behaviors that traditional retail could only dream of. Test your knowledge about a groundbreaking moment in gaming's virtual retail history that changed how players perceive digital ownership and value.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Team Fortress 2 (2007) with its hat economy and metal currency system
World of Warcraft (2004) with its auction house system
Second Life (2003) with its Linden Dollar currency and user-created marketplace
Counter-Strike: Global Offensive (2012) with its weapon skin marketplace