Two hypothetical questions:
1. Your customer owns a grooming clinic or pet store...uses your images on his mobile van or a billboard...are you still happy with the show print purchase?
2. Your customer makes gourmet doggie biscuits...uses your images for 100,000 package labels...same question.
I'm not trying to tick you off, I'm just wondering where people draw the line...seriously...it happens to all of us.