Our right to free speech is not granted by anyone's consent or by government decree. It preexists the state and cannot be taken away.
We hold this truth to be self-evident. We are endowed by our creator with certain unalienable rights.
If any government becomes destructive of these ends, it is the right of the people to alter or to abolish it.
You can wax poetically all you want about endowment by the creator, but try saying racial slurs on daytime TV and see how long that lasts.
Advertisement is just another form of speech that can be limited.
What part of that are you confused by? You are making a brash claim that the writ of the state includes the ability to censor speech.
Your right to free speech is not granted by anyone. It's your natural right. It's not possible to separate this right from a human with a law.
I get the impression that this "natural right" term is intended to preclude inquiry and shut down discussion.