Back in 2010, we decided to give away Fedora stickers to anyone who sent us a Self-Addressed Stamped Envelope (SASE). Lots of people did, and we sent out a LOT of stickers, all over the world. Most of them made it to their recipients, some were returned to sender, and some never made it anywhere, doomed to roam the inside of a post office forever.
We ran out of supplies for this effort and had to stop it. All good things must come to an end.