When Epic Games Store launched in 2018, what revolutionary retail revenue-sharing model did it introduce that challenged Steam's dominance?

In the competitive landscape of digital game distribution, various retail platforms have implemented innovative strategies to challenge established market leaders. One particular store made waves in the gaming industry with a groundbreaking revenue-sharing model that dramatically differed from industry standards, directly impacting how developers and publishers approached digital distribution. Test your knowledge of this significant retail innovation that disrupted the gaming marketplace!

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An 88/12 split favoring developers (88% to developers, 12% to Epic)
A subscription-only model with no individual game purchases
A 50/50 revenue split with additional marketing fund contributions
A tiered commission system based on game popularity and sales volume