How to make special "coupon code:" area?
Every so often a deal has a coupon code to get the deal. I have seen it mainly on the sponsored deals, but a mod added one on a deal of mine: http://deals.woot.com/deals/details/0a740c43-9c3d-4f0e-8082-3ef8f1815bd0/build-a-bear-16-candy-corn-teddy-bear#6
How does one make this show? Is it a mod only option?