A TikTok video showing a Shake Shack order getting more expensive right after a customer skipped the tip prompt has drawn 2.9 million views and 296,200 likes. Recommended VideosIn the video, Powell said his wife told him that Shake Shack raises prices per item if you don’t leave a tip. The screen then showed a message saying the order total was being calculated. This is not a Shake Shack policy, and we’re currently looking into it with our licensee, HMSHost, that operates the Salt Lake City airport location and kiosk system.” The incident follows other reports of customers questioning tipping prompts at Shake Shack.