> It would be awesome if one could craft a FOSS license that allows all FOSS uses of the project except creating a US letter variant. That can't happen, becaus

> It would be awesome if one could craft a FOSS license that allows all FOSS uses of the project except creating a US letter variant. That can't happen, because your desired exclusion is incompatible with FOSS. You could do that with a non-FOSS license.