There are some marketing strategies that some people might think of as “black hat marketing” as they are not considered ethical. One of these examples is called “coupon stacking.” Coupon stacking is a strategy where you can use a coupon to buy an item for a lower price and use a store’s discount to buy another similar product for a lower price.
Coupon stacking will save you money, but it could also be considered unethical because the products do not have different prices at the store due to promotions. The one thing missing from this tactic is the customer being presented with the option to pay the full retail price or buy more than one product they want.