You are wrong, I just did some research and here’s what it says in epic’s faq:
If I release a commercial product, what royalties are due to Epic, and when?
Generally, you are obligated to pay to Epic 5% of all gross revenue after the first $3,000 per game per calendar quarter for your product, regardless of what company collects the revenue. For example, if your product earns $10 from sales on the App Store, the royalty due is $0.50 (5% of $10), even though you would receive roughly $7 from Apple after they deduct their distribution fee of roughly $3 (30% of $10).
Even so, I’m not concerned about this, I’m more bother with having to calculate all that stuff for every game.