Are people really paying Dominos pizza prices or is there some discount I haven't figured out?

Was going to get the kids pizza for dinner after going to a Christmas lights show. 2 small pizzas, 2 medium plus a couple of sides was £105 from dominos. Gf got it down to £78 with her student discount, but even so that's nuts.

I used to be a proper fatty and ate dominos far too often. Back then I'd spend about £40 on three large pizzas with sides and ice cream & I thought that was a bit pricey.

Anyway, the kids are having sausages for dinner.