Not sure how it's dystopian. If people can get a cheaper meal by eating at off-peak times, that doesn't seem a bad thing. It's already the case at some restaurants: I can think of several breakfast places that offer early-bird specials before a certain time. And IKEA does it at their restaurants with cheaper deals on Monday-Friday etc. And of course many bars do "happy hour" deals.

Dynamic pricing ultimately makes more efficient use of scarce resources (staff time, tables, etc), which benefits everyone.

The existence of fast food? The fact that you can get a hot meal in minutes for pennies without getting out of your car? The fact that dynamic pricing means it will be cheaper in the middle of the night?

There’s absolutely nothing dystopian about retailers and merchants trying to maximize gross revenue. This is the basis for almost all that is good in our society.