Rogers definition of “Unlimited”

Alec Saunders has an excellent posting about an issue he is having with Rogers. It seems he purchased an unlimited wireless data plan but Rogers had put a footnote/hyperlink on the word “unlimited” stating that they would charge an additional per MB fee for any usage above 25 MB. In my view, the right thing to do would be to define such a plan as a “power user” plan and avoid redefining English terms to mean something different than what they are commonly understood to mean.