Seems you are right: "When releasing a product using UE4, you're signing up to pay Epic 5% of gross product revenue from users, regardless of what company coll

Seems you are right: "When releasing a product using UE4, you're signing up to pay Epic 5% of gross product revenue from users, regardless of what company collects the revenue. That means: If your game makes $10 on the App Store, Apple may pay you $7, but you'd pay Epic $0.50 (5% of $10)." Still, you'd have to legally define end customer because you could have, as I pointed out, much more complex cases. I didn't search much, but couldn't find the actual fine print license to see how they did it, but they probably did it well and ironclad and don't need legal advice from a guy with no formal legal education. I stand humbled.