I've been using AutoZone rewards card for 2 yrs (approx. 4x/yr - all greater than $20).
Oddly enough, I've never been able to apply my rewards points. On multiple occasions, I've been told the scanner isn't reading my card properly or points were all erased because I didn't redeem within six months (even though I had purchased within the past month). After another purchase last month, I had finally earned 3 points, only to spent $117 today and watch the computer decrement my points to 2!
Yes, I went from 3 to 2 points AFTER spending >$100!! It's an ABSOLUTE SCAM!!!
Monetary Loss: $20.