The Problem With Stamped | Astro Aficionado:

The problem with Stamped is that it correlates popularity of your stamps to quality. It makes the assumption that because you like something ? and use up one of your ?limited stamps? to demonstrate this as a showing of quality ? that others will be inclined to agree or incited to try out whatever you stamped. I don?t think that could be further from the truth.

Super valid. Why do I lose a stamp for endorsing the most amazing Egyptian resturant ever just because none of my friends will ever go there. Endorse the Apple Store in on the other hand..