When your budget is toighter than Ross Geller’s leather trousers, you might find appeal in a 2-for-1 burger deal. A 2-for -1 any deal is the scourge of the food industry; a desperate attempt to lure patrons to an establishment that does not have the following it should have gained by charging an appropriate amount of money for a product that lives up to, and exceeds, your expectation. 2-for-1 reeks of stodgy sauces, supermarket bread, an over-cooked patty, and nothing more creative than iceberg lettuce, fridge ripened tomato, and pretend cheddar cheese.
There are only very extreme conditions where I would ever offer a two-for-one special. I don’t believe in them, and neither should you.