There are limits to free speech just like there are limits to other freedoms. For example: “The right to swing my fist ends where the other man’s nose begins.” IOW where harm is done. So the question becomes do messages like this cause harm? IANAL, but I believe that it would qualify as hate speech, which is widely considered to cause harm.
Seeing this post about the sale made me check out the Wikipedia article about the game, since I never knew anything about it either. After reading that I’m pretty much sold on it. For a few dollars it’s worth a try.
You don’t need humanoid robots for that, just an economic system that is not based on trading labor for income. That is what has been holding us back for a long time.
Look under your chair… It’s an ad!!