If you got 10 scans after distributing 80 stickers I would not conclude that "no one scans QR codes". This is, instead, an impressive proportion of responses, unless I misunderstand.
To be fair, I'm more disappointed, that i didn't track each scan a little further, and I'm also disappointed no one flamed me when their scan took them to a web page telling them they shouldn't go around just scanning random things.
If there are thousands of foot traffic by the 80 stickers per day, then I'd say 10 scans in a month do sound relatively scarce. But you are right, 10 != no one.