It’s possible Epic are baiting the app stores, betting that the current anti-trust questions around Apple and Google support a change. Either Apple and Google capitulate to this move by Epic, and Epic wins. Or Google and/or Apple come after Epic, creating a public scene that emphasizes their monopoly-like behavior, and failed lawsuits or government action mean a win for Epic. The third option—the big guys come after Epic, Epic enjoys no support and simply lose—is relatively unlikely right now. So perhaps Epic is forcing the issue, seeing an opportunity for their own gain in the midst of societal gain.