Отсутствие лицензии не позволяет пользоваться производными продукта

[denis-trofimov]

https://www.fastcompany.com/3014553/what-coders-should-know-about-copyright-licensing

You’re under no obligation to choose a license and it’s your right not to include one with your code or project . . . But generally speaking, the absence of a license means that default copyright laws apply. This means that you retain all rights to your source code and that nobody else may reproduce, distribute, or create derivative works from your work. This might not be what you intend.