From the announcement:
We had a great time celebrating Holaresh with you. To show our thanks, use the code "Holaresh" when checking out from our online store to get a 20% discount on purchases of $30.00 or more. The coupon code is good through Dec 26! And you made it very clear you enjoyed hearing more about the world this way, so stay tuned for more events like this. Spike and win!