Got an email this morning:
Offer available online only. Expires 1/19/2018. Discount off regular menu priced Signature, Gourmet Delite®, Stuffed, Fresh Pan, Gluten Free, and Create Your Own pizza up to 5 Classic toppings. Gluten Free crust is topped in a shared kitchen that also handles gluten-containing ingredients. At participating locations. Limit 3. Not valid with other offers
Not sure if it's regional or nationwide. Please report back.