Yes, the GPL license says GPL code must remain GPL after forking and that the license itself does not cover any usage scenarios, only when making transmissible copies.
If I made a copy and gave it to someone else, whether by sale or contract, it has nothing to do with whoever I got it from, they have no say over how it is copied. Likewise to whoever obtained a copy from me, I have no say over what they do with it as long as remains compliant to the GPL.
It is also illegal to add additional terms to the GPL, you must give the same freedoms as you were given.
Yes, the GPL license says GPL code must remain GPL after forking and that the license itself does not cover any usage scenarios, only when making transmissible copies.
If I made a copy and gave it to someone else, whether by sale or contract, it has nothing to do with whoever I got it from, they have no say over how it is copied. Likewise to whoever obtained a copy from me, I have no say over what they do with it as long as remains compliant to the GPL.
It is also illegal to add additional terms to the GPL, you must give the same freedoms as you were given.