That's just a generic special, that's not a coupon. A coupon is exactly what it sounds like - it literally requires a coupon to redeem, either a physical coupons or a digital "coupon."
When I worked at a restaurant we had both - specials that everyone got and coupons deals that you needed a piece of paper for. They were similar as it was just typing a code into the register, the big difference is typing in the coupon code without a piece of paper was considered stealing and anyone who did that was fired on the spot. You also couldn't redeem multiple coupons at once where you could get any number of open specials you wanted. We always directed customers towards specials.
The coupons were a significantly better deal than the general specials available to anyone. The coupons were mailed to every house in a ~20 mile radius once a month.
Yeah, neither Pizza Hut nor Dominos we're actually that concerned about the coupons. Both places had drivers apply coupons to orders and pocket the differences, and while I'm sure they would have gotten fired if caught, not having the correct amount of coupons would lead you to be caught.
I think there were one or two actual coupons at Pizza Hut, where you did need the actual code and the piece of paper, but they were things in the coupon books kids would sell to raise money. At Dominos basically the best deal was the carryout special, which is now even advertised online.
When I worked at a restaurant we had both - specials that everyone got and coupons deals that you needed a piece of paper for. They were similar as it was just typing a code into the register, the big difference is typing in the coupon code without a piece of paper was considered stealing and anyone who did that was fired on the spot. You also couldn't redeem multiple coupons at once where you could get any number of open specials you wanted. We always directed customers towards specials.
The coupons were a significantly better deal than the general specials available to anyone. The coupons were mailed to every house in a ~20 mile radius once a month.