Why would it be illegal? A cease and desist is just a fancy letter saying do what we want or else we’ll go crying to a judge. If the original dev hasn’t done anything wrong (I’m not familiar with the project but I’d still say that’s highly likely to be the case) then there’s nothing to worry about. So make all the clones you want, and watch a dumbass company Streisand itself
Seriously! I just wanna see one Dem call him on this and say “yup, you’re right! so here’s Biden with a car battery and jumper cables, an all-in-one water boarding set from Bed Bath & Beyond, a bucket of nails, and one 56 inch magnum dildo. what happens in the white house stays in the white house, ya know what I mean *nudge nudge wink wink!”