Comment by RobinL

There's a theory an economics that says that the more different prices a provider can charge the more of the surplus they capture (ie they can tilt that percentage towards the seller and away from the buyer).

Of course, if they're a monopoly provider and the buyer really needs it, they have to cough up. But generally there are substitute products. So the buyer would do well to look for an alternative that doesn't do differential pricing to capture more surplus for themselves.