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.
A game that sells 10,000 copies on Epic may sell 20,000 or more on Steam since Steam is so popular. If the game sold for $20 they would get $200,000 from Epic or $280,000 from Steam in that scenario.
That’s an awfully generous ratio. I don’t recall all the specifics, but a year or so ago an indie game dev posted the sales stats of his game and left out the Epic Store numbers. When asked, he said that EGS accounted for less than 1% of his sales. Now, I’m not saying that’s going to be the case for all games, but considering EGS’s status as the “black hole of videogame marketing” I would say a 10-1 Steam/EGS ratio wouldn’t be surprising.