From the announcement:
For you villainous types trying to get away with the loot in Batman: The Animated Series Dice Game, just order a case (that's six) of the game, send your invoice to our Retail Liaison, and we'll get you a playmat! (You can also find these instructions on our flyer.) You will get one mat per case ordered. The mat is perfect for a demo table, an event prize, or a unique item to sell - the choice is yours! It shows all four characters from the game, and has their powers handily listed right on the mat!
If you're looking ahead, we're also offering a free playmat with preorder of a case (six games) of Ghosts Love Candy! Simply fill out our preorder form and email a photo or scan of it to the Retail Liaison. We'll get your info to the distributor, and you'll get a free playmat featuring cute art from the game and spaces for all the cards. Like our other playmat, you get one per case preordered. It's a spooky fun way to spice up your demo table when Ghosts Love Candy comes out this summer, so take advantage of this offer before it disappears!
If you have a local game store that would like free playmats, let them know about these offers. If you're a retailer yourself, feel free to email us with any questions you might have.