The author clearly doesn't understand the concept of a "social entrepreneur". Just making something conducive to sharing and socializing is a gross distortion of the term social entrepreneurship.

Correct me if I'm wrong, but aren't social entrepreneurs creating and managing a venture for social change, not enabling people to share pretty beads and sexy dresses.

While the word "social" get's thrown around in every possible way, we are losing our semantics by labeling any blowout success in "social media" as a force for positive change. While Pinterest is a very interesting step forward for creative expression, it is hardly a product of social entrepreneurship.