Are there reasons why this wouldn't work?
I am curious what would the legal challenge be if dynamic pricing on the sell side is considered acceptable?
Look at our system now. Big capital can move their tax headquarters to Ireland, its service center to India, its manufacturing to China. Hell, they can now even import low wage workers to the EU and US on visas if it will give them an advantage.
But good luck to any consumer trying to buy products at the same prices sold in these same places (e.g. pharmaceuticals). Even digital goods like games, music, and movies are priced differently, but consumers can never take advantage of currency arbitrage as companies ban VPNs, track IPs, restrict payments by the address of credit cards, etc.
Indeed, corporations are now considered people in the US, which more or allows allows then legislate away any perceive threats to the rigged system.[1]
[1] https://www.theatlantic.com/politics/archive/2015/06/raisins...
An analogy I'm thinking of is, imagine the website has a box that asks you to input your age, then it shows you your price. If you put in a number over 40, the price will be higher. Now you can just put in a number under 40 and get a lower price, but their response would be to make it against their terms of service to "lie" about your age.
Similarly, they will equate using "someone else's cookies" to lying and claim it is morally wrong and illegal and against their TOS. Even though what they're doing is discrimination.
Indeed, this seems to me to be no different than a form of reselling.