Happy Seppuku made it through another stretch goal on Kickstarter and so certain pledge levels get a free stamp of their choice.
From the update:
Congrats everybody! We smashed through the second stretch goal! That means that everybody at the “Gain a little ground” and the “Whole Nine Yards” level (including the early backers) now get and extra stamp choice. That means “Gain a little ground” now gets five (5) stamp choices plus the sampler. “Whole Nine Yards” now gets ten (10) stamp choices plus the sampler! Now onward toward the Third Goal, where we will open up a whole new stamp design, Tile- Diamond pattern. When we do the “I want it all” level will automatically get this stamp included with their pledge!