I couldn’t find anything about this in the EULA or on the forums.
Let’s say I make a UE4 game that has extensive modding support, comparable to Garry’s Mod or Cities: Skylines. The players could create custom content for the game either in-game or using the UE4 Editor. The custom player-made content would preferably be shared on Steamworks. Steamworks allows content creators to charge for their custom content. I’m not exactly sure about the details, but I think the revenue is split 3-way between Valve, the game developer and the content creator.
In this case who would pay what equity to whom?
I’m pretty sure I would have to add this revenue to my total revenue from the game and pay the 5% equity after $3k/quarter to Epic.
What about the content creator? Does it make a difference whether the content was created in-game or using the UE4 Editor?