A man shocked viewers after capturing a Utah Shake Shack kiosk hiking up its prices after he didn’t leave a tip. Shake Shack has since responded, saying the Salt Lake City airport location was experiencing an “error within their kiosk technology.” “My wife says that if you don’t tip at Shake Shack, they make it more expensive per item,” he says. Did The Shake Shack Prices Increase After The Customer Did Not Tip? Businesses can use different prices at different times or under different conditions.