If it is made in godot or unity (unsure about unreal an others), it would be quite impressive to make it unable to compile on linux. It should be as easy as just chosing another release target.

This is exactly what it was designed to solve before cryptobros turned it into a pump and dump scheme.

If you want to buy something from seller X that is between you and X and no one else. No goverment, payment processor or other third party can get a cut or stop it for any reason.