Don't misunderstand this as an endorsement of jerky trademark enforcement.

My point was that they did the work to associate "pin" with this concept in the public mind. Of course they don't own the word. That's just stupid. When people do these homages or clones, they are gaining traction and influence by riding on the work they did. Enforcement? Who cares... it's just unoriginal, cheap and lazy to trade on the name.