Suggestion - Card with discounts

How about a card which doubles as a discount card? There’s several of these group buying schemes for businesses. A company the size of the bank should be able to get some sharp rates at various retaillers.

What about the third party security issue that hasn’t yet been resolved? Would that be an issue with a discount card?
Or would that even apply? What sort of card would double as a discount card.

Keep in mind these are the views of fellow BNZ Community users, and not BNZ.