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.
As a gamer living in eastern Asia, Epic’s exclusives that could only be bought in certain countries due to payment processors pissed me off enough to boycott. I generally don’t touch any games that started as exclusives there, either. The couple of exceptions I have, I waited until they were a couple of years old and > 50% off on Steam or GoG