Why can we not get these brilliant ads here, although funnily you do get the odd clown who barges past and makes comments about real photographer or such like.
Because people in North America don't have as good a sense of humour when it comes to advertising.
Europe and the Eastern Bloc have always had "funnier" advertising. For us here, it's all very serious and mostly bland. ;-)
Look at some of the English advertising campaigns over the years, brilliantly funny, but oh so subtle in their choice of humour!