The same sweeney that open sourced unreal engine and will open source unreal5 engine? The same sweeney that doesn't require you to pay any licence fees for projects that made less than 1M$ revenue? You can take unreal from open source, do whatever you like with it, sell your thing outside epic store and if you made less than 1M$ revenue then you pay nothing to epic. And if you happen to make a lot of money and sell through epic store sweeney doesn't double dip. It's only store cut no engine licence fee in that case.
Indeed, sweeney is evil. We need less of the things he is pushing for. Less I say!