It's not a lie, it's a creative way of altering the truth. It never hurts to raise the customers' sales tax. Never trust someone offering a discount. The joy of profit is exceeded only by the joy of revenge. Q's tend to be bad for business.
Cheaters never prosper if they're always getting caught.
Never lie to a Gorn. You need your legs. The most profitable of arts. A cunning one can grab it. Who find a treasure finds 1000 new friends.