Their “deal” pizza went from $5.99 in ~2010 to $6.99 and now $7.99. I do not remember when the changes happened exactly, but I do remember back around 2010 ordering the pizza at that price when our friend group would get together to watch Doctor Who.
The $6.99 to $7.99 increase happened in the last yearish (I checked an order email from May 2023 and it was $6.99). I only get delivery when I am at work and my wife is unable to bring dinner, but I know the delivery fee has been increasing too.
ETA: went and looked back further at order emails, in June 2022 it was $5.99. My earliest order email is from 2012, and they were $5.99 then as well. So at least 10 years at $5.99.
Edit2: the $7.99 is because of the extra toppings. Medium pizzas are still $6.99 with coupon. I was up way past my bedtime last night, thus the mistake.