I wonder why your "free market" is always siding with the offeror, never with the customer. Your rules are easy: The perky crook wins. But beware if the ordinary citizen tries this method. He goes to jail. You are screwing yourself.
You don't understand basic economics.
Let's say a man and wife decide to save up and purchase a second home. They save their money and, eventually, make a down-payment on a property and incur another mortgage. The property was in distress when they bought it but they invest more money to replace the roof, the flooring, repair plumbing, install new appliances and carpeting, give it a fresh coat of paint, etc. Then, in an attempt to recoup what they've invested, they want to rent their home and make a PROFIT. But, by your logic, they should NOT be permitted to make a profit because they're obligated to eat the cost of the refurbishment and become a de facto charity by renting their property so that someone else can live in it for less than market value. Right?
Why is this "fair" and why is this good economic policy?