Then start with the Playstation, Nintendo, Xbox and Steam stores. They take 30% off the top as well. Epic's store is only doing 12% for now as they try to catch up to the bus they missed.

Wanna get a DLC? They all take a percentage. Also regardless of the money you spend on making your game. They all have to review it and only if they approve will it get published. Going to selling some XBox physical disc? You pay your percentage on what you print not what sells. Also you need to use a trusted disc manufacturer, they pay a percentage to XBox also, note this is all the same for Sony and Nintendo.