Link.me have provided the first ever longevity statistics on a QR Code that I have seen (image below). I wrote about HarperCollins placing a QR Code on the book jacket for L.A. Candy by Lauren Conrad just over three years ago. Today’s results of the longitudinal study shows the campaign is still going strong and currently averaging around 500 unique scans every month. HarperTeen’s have published the book in different regions of the world with multiple versions of the QR Code printed on the book jacket but they all drove back to the same mobile site using the link.me platform. Hence the ability to produce this kind of data.