The Chardonnay Socialist in me reckons that should be completely the opposite. Let apps that make less than $10k a year (or perhaps apps from companies/brands with less than $1mil turnover per year) be free. As your revenue goes up, your percentage “tax” for using the AppStore goes up.
In my opinion, Epic needs a free ride way way less than a couple of high school kids or college grads with an innovative idea.