I think the basis for the complaint is that they will be giving a free month of AT180 to AT60 customers. So customers paying $30/month ($360/yr) will be getting $20 of free programming.
However customers who are paying $100/mon ($1200/yr) will be getting nothing.
This is the kind of question that should be raised in the boardroom when they make such decisions. When you offer a promotion, it is usually a good thing not to P.O. your best customers.