I don't think Apple actually forbids open source from the app store, do they? As far as I understand/interpret their policy: they only prohibit so-called copyl

I don't think Apple actually forbids open source from the app store, do they? As far as I understand/interpret their policy: they only prohibit so-called copyleft licenses, and/or ones which would be violated inherently by the app store's binary-only distribution model.