I talked with Andy (magog) a bit about this today. I was really surprised by it as well. I read the email, and it's fairly light on information; and more on why they're doing it (the charity).
The parts I found the most telling was:
"Charlie now has a vision to use his skill to create a unique Domino’s machine. Design will begin as soon as we have finalized our minimum order size. Our goal is to secure enough advance orders (requiring a $1,000 deposit) to build a prototype that will be featured in the Partners Foundation booth at Worldwide Rally 2016 in June.
Production will begin immediately after Rally and approximately 25 machines will be built and delivered per month until the orders are completed. The final cost of the machine will be determined by the total number of orders (more orders lower the price) and the final layout of the machine, but we can safely say that they will cost between $4,500 and $5,500 plus shipping. A portion of each purchase will be donated to the Partners Foundation. Through this unique and once-in-a-lifetime process, we are hoping to raise at least $50,000 for Partners!"
Besides that, there is nothing else regarding information on the pin. I imagine, and hope, more will come soon. Hope this helps a bit!