Can you imagine if cruise ships had advertisements on the hull! At night you would see flashing billboards of lets say McDonalds on the ships hull! That would be crazy, just think what a Formula 1 Grand Prix car looks like and then think of a cruise ship like that, lol.
Lol yeh your right, doesn’t make sense out at sea. The ships would look so bad with ads all over them but you never know what could happen in the future! It seems the hull artworks are trends these days and maybe companies would want to take advantage of it! But I hope not.