Stamped Truth

I went to pay for something today and saw this:


Those red-stamped words say "Not 2 B Used 4 Bribing Politicians. Amend the Constitution #GetMoneyOut."

When I flipped it over, I saw this:


Which reads,

"Stamp $$$ Out of Politics. (If you find this, let me know. stmpr.me/gphr)"

That URL leads to a form where you can report the city where you saw the bill and how you got it. I don't know how I got it; it must have been among the change when I spent a larger bill. It's just in circulation.

Just like the idea.