Pledge rules. If you back out after a hunter has found the item matching your description and price, the pledge goes to the hunter. Cancel earlier or let it expire and the pledge comes back to you; hunters are notified.
May we count visits with Google Analytics? It shows us what people find useful. No ads. Google may process data in the USA too — by allowing it you agree to that as well. You can change your mind any time at the bottom of the site.