In a charming story about how a family in St. Louis Christmas photo ended up as a display ad in the Czech Republic the Associate Press includes a photo of the picture. So now not just a few thousand Czech people were able to see it but also millions of people across the world.
I won't link the story as the AP is paranoid about it but it should be easy to find. Just google "Xmas pic mysteriously becomes storefront ad".
Also make sure you choose the right policy on Flickr for your photos.