Retailers often have weekly sales. If that's not "routine" what is? Is it only "negotiation" if it's happening on a per customer basis? Moreover apps with targeted offers is literally doing that. The company is assessing a given customer's willingness to pay, possibly on a daily basis, and sending offers/coupons in response.
I never argued it's not price discrimination. In fact I was arguing the opposite, that price discrimination is the same as "negotiation", and it's alive and well in modern times. It might not be "negotiation" in the sense there's two parties going back and forth, but the end goal of negotiation is price discrimination. If coupons and apps do the same thing, does the fact that you're not talking to a salesman really matter?