When Gregg Steiner became the vice president for Cleveland-based Pinxav, he knew the diaper-rash product manufacturer's sales were declining. At a trade show Steiner was pitching the product to some new mothers who had never heard of it. The mothers weren't convinced that they should part with their money for a new-to-them product. The inspired Steiner said, "If you're not happy with the product, I will not only give you your money back--I'll buy you our competitors' product. I'll buy you whatever other brand you want." Suddenly, the women were interested, and they all plunked down their money. None of the women ever took Steiner up on his offer. So Steiner decided to make it part of his business practice. This new guarantee was an example of ____.