Free Wi-Fi Makes Money. Schlotzsky's, small cafes see upturn from free Wi-Fi: Last Thursday's New York Times Circuits section brings us the news that commercial retail shops offering free Wi-Fi are seeing enough of a small uptick in business that it makes sense to continue to not charge. Schlotzsky's has seen 6 percent more business because of Wi-Fi, which could mean $100,000 per shop per year…. [Wi-Fi Networking News]