Yes, but my point was that legally Unity and Epic were nothing alike. Epic's license and the associated fee structure are tied to the version in effect when yo

Yes, but my point was that legally Unity and Epic were nothing alike. Epic's license and the associated fee structure are tied to the version in effect when you give your notice to Epic, which can be at any point in development up to the moment of commercial release. Unity's license and associated fee structure can change at any time and apply somewhat retroactively, and apparently even to third parties like game subscription services.