An interesting thing to note regarding two emails I received from dominos.
It's along similar lines a while back where people were complaining about varying prices/offers from McDonalds.
On 1 account, i received codes for 3 Pizzas 3 sides for $34 delivered, $29 pickup.
A few seconds later I also got the same email to the same email account using ±dominos@gmail.
Same deals but $1 cheaper.
Although only $1 cheaper, just find it interesting that they are starting to do this.
It's quite a common marketing technique called A/B testing: send different offers to two groups of people and track their orders through to completion. Then work out which one was more profitable. If reducing the price by $1 got enough extra orders through the door to make up for the reduced margins, it was worth it.