On reading that form I'd say that Wind should have stated clearly on it that the special deal is available only to [insert name of target group here] and that the offer can only be processed at [insert store location(s) here]. A simple mail merge would accomplish exclusive delivery to only the targeted people named. If someone is not in that group, too bad.
As to whether giving special deals to certain groups is appropriate, it is one of the foundational principles of business, commerce, and capitalism. As an example, think of the principle of the "loss leader" and how it is selectively targeted to achieve other profits that are expected to exceed the immediate loss in revenue. In this case I don't see what Wind has done as any sort of problem, but the implementation and the staff behaviour was terrible.
As to whether giving special deals to certain groups is appropriate, it is one of the foundational principles of business, commerce, and capitalism. As an example, think of the principle of the "loss leader" and how it is selectively targeted to achieve other profits that are expected to exceed the immediate loss in revenue. In this case I don't see what Wind has done as any sort of problem, but the implementation and the staff behaviour was terrible.