You're right, they never found that killer use case. The use case I'm interested in is something like a purchase receipt from a store or restaurant, and you wan

You're right, they never found that killer use case. The use case I'm interested in is something like a purchase receipt from a store or restaurant, and you want the customer to go to a page or open an app to write a review. A QR code printed on a paper receipt would be perfect, if people actually used them. I found this article[1] that talks about alternatives, namely augmented reality, NFC, iBeacons, clickable paper, Google Goggles, and SnapTags. Nothing seems as straightforward as QR codes promised to be. 1. https://econsultancy.com/blog/64891-six-mobile-marketing-alternatives-to-qr-codes/ https://econsultancy.com/blog/64891-six-mobile-marketing-alt...