What unique approach did Epic Games use to attract developers to their store at launch, differentiating from Steam's business model?

The gaming industry has seen various digital distribution platforms competing for market share. When Epic Games launched their store in December 2018, they employed a bold strategy to challenge Steam's dominance. This trivia question tests your knowledge of Epic's innovative approach to breaking into the digital game marketplace and attracting both developers and players.

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They offered developers an 88/12 revenue split (compared to Steam's 70/30)
They provided free game engine licenses to anyone publishing on their platform
They guaranteed minimum sales or would pay the difference to developers
They eliminated all user reviews to protect developer reputation