I'm okay with that analogy, if we understand that the USPS made an agreement "You may have 250 heavy-duty trucks arriving to your door per month", of course allowing for changes to be made in said contract. Once those 250 heavy-duty trucks actually got rolling, if it became deleterious to the USPS, I can see it being reasonable to change the terms of the contract according to the contract itself.
I'm purposefully arguing for the unpopular side here, btw. I'm definitely in the 99th percentile of bandwidth users and likely on verizon's own enemy's list. I can see it from the other perspective is all.