That still seems lousy- I don't go to Disney to negotiate when I buy something. If that's an option in Galaxy's Edge, I'd bet some guests would think it's an option throughout the park- creating frustration when someone thinks there's a magic word to get that hoodie for $10 off.
But the more likely case? Disney's way overselling the interactivity of the land. I bet that what's there when it opens is less than we were told (like how the Falcon is having to get training wheels after playtesting)- and within a year of open, even more stuff gets taken away.
Much of what Imagineering is spewing and trying to accomplish with this is cute, and sounds great on paper- and would properly work great in a stand alone park with limited capacity and some sort of preview video to watch beforehand- but inside Disneyland? It'll be a nightmare.