Customers were not charged retroactively for the discounted amounts, but their bills were "corrected on a moving-forward basis."
Well, of course, otherwise they will lose this great excuse for a price hike.
Also, unless their billing system is completely ridiculous, an employee account would only be able to switch users to a lower existing plan (e.g. some sort of concession), and I doubt that even their most discounted plans lose money. In the end, they claim to have lost 2.4 million (not clear if it is in less than a year) out of 16 billion annual revenue - so, what is it, a 0.015% price increase? But anyway this is Comcast...
He has not acquired a fortune; the fortune has acquired him. -- Bion