Would it really be worth it for the companies? If I was CEO of Coka Cola, or McDonalds, I would rather spend the money it would take to put one billboard in space on one thousand billboards on the road. We've already made a mess of our planet, and now its going to reach out to space too. I'm glad that its the US government that is the first to oppose advertising in space, because they have a lot of influence in the grand scheme of things.