Which pioneering feature did Epic Games introduce in their loyalty program that was later adopted by many other gaming platforms?

In the competitive landscape of gaming and virtual worlds, customer retention strategies have evolved significantly. Loyalty programs have become sophisticated ecosystems designed to keep players engaged and spending. This trivia question explores an interesting fact about gaming loyalty programs that might surprise even industry insiders. Test your knowledge about how major gaming platforms leverage loyalty mechanics!

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Seasonal Battle Pass with progressive rewards
Cross-platform achievement tracking
Cryptocurrency-based loyalty points
Subscription tier membership with exclusive developer access