nostr:npub1g0tuf634rz4suczwj7kgnecr6cyt0eu9xmp3sp0fku68mqehq4msp3tvm4 
Isn't happy hour kind of the same thing? Reduce price during times low traffic.

Feels like it's more about perception than actual mechanics. Dropping price for low demand feels fair, but raising it during high demand does not.

Edit: also, as you say, hotels and airlines do this already, without any outcry.