Which game is widely credited with popularizing the battle pass monetization model in mainstream gaming before it became an industry standard?

Battle passes have revolutionized monetization in gaming, creating recurring revenue streams while offering players a sense of progression and exclusivity. This monetization model has spread rapidly across the industry, changing how games maintain player engagement and generate long-term revenue. How well do you understand this influential market trend that has reshaped gaming economics?

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Fortnite (2017)
Overwatch (2016)
League of Legends (2016)
PlayerUnknown's Battlegrounds (2017)