Hence the tiny text on the bottom of the screen about "paid actors" or similar. But again, that's about prohibiting unfair business practices, misleading advert

Hence the tiny text on the bottom of the screen about "paid actors" or similar. But again, that's about prohibiting unfair business practices, misleading advertising in this case. It has nothing to do with the legal capability of the actors to contract to tell lies, and nothing to do with free speech (except that it's a limit on the free speech of the actors and the company).