Make a $2 donation with your Signature Pizza purchase and get a coupon for a FREE 10 inch Signature Pizza with the purchase of any drink. Coupon valid 10/1/18 - 10/31/18. Gluten-Free crust or vegan cheese available for an extra charge at participating locations. Not valid with any other offers or promotions. One coupon per person per day regardless of how many signature pizzas purchased.