Very interesting article from the Sydney Morning Herald:
http://www.smh.com.au/interactive/2017/the-dominos-effect/
Do I think it's happening in NZ as well? With 40-50% off pizza coupons, I'm guessing yes. Perhaps it's something for you to think about before you order your next pizza.
Who pays full price for a chain pizza? It is a bit like retail chains these days, where you only really buy stuff if it is on special.