The Epic First Run programme allows developers of any size to claim 100% of revenue if they agree to make their game exclusive on the Epic Games Store for six months.
After the six months are up, the game will revert to the standard Epic Games Store revenue split of 88% for the developer and 12% for Epic Games.
Some games are already like this. Borderlands stuff has been an Epic exclusive for a year ish in the past. I played on other platforms to avoid it. I don’t know if that’s still the case or if Borderlands 3 was the exception.