@pluralistic
How does that "individual pricing in grocery stores" work? Does that mean the price can change from the time you take it off the shelf to the time you check out? How does that match the "economic agreement"? (which depends on full information on both sides).
At least airplane and online store prices lock in the individual price when you select it. It doesn't suddenly change at the payment page. Although, I'm sure that's the next enshitification step...