I get free drink refills at Burger King so I'm going to complain and demand that BK ensures I get free refills at McDonalds.
Your analogy should be "I get free refills at Burger King unless Burger King is supplying McDonalds Coke cause they don't have enough of their own. The only way you'll know is by looking under the Coke machine if you read the side of the cup."
There's two sides to this but it's pretty clear it isn't clear for users what is and isn't metered. Personally I don't really think that Orcon has been deliberately misleading people. It's one of those unfortunate circumstances that may require a little goodwill on both sides.