Low Earth Orbit billboard for 7B people
businessinsider.com
businessinsider.com
And the next logical step to that is guillotines.
Fucking disgusting. Advertisers are scum, and if you're reading this and working in ads or adtech, shame on you.
(Fight Club, 1999)
But something along lines of UN Humanity Heritage Commons could be. There is a rather effective way to control launches - whatever goes to orbit passes that, or else - so it might get challenging to launch this kind of advertisement. At least for now.
Also every time we launch something in space there are pieces of garbage that stay there in low orbit for years, so it doesn't look like the place is considered of very high cultural value at the moment.