@billdollins spotted a neat little Web tool called qrd.by, which offers a great way to map QR code scans without worrying about supporting or investing in building mobile Apps for retail engagement. All a retailer has to do is enter the URL and a physical address for the scan.
After completed, just print the pdf of the Code and affix it to the address supplied. Each scan of the code maps back to the physical address/XY entered, which essentially eliminates the need to support geotagging Mobile Apps, yet still capture local & mobile scan statistics, which could be used for subsequent targeting campaings based on traffic and techographics.
And (of course), there's a map view of scans available to augment other stats. Very nice. Hey Mom, you could use this!