The dataset
We looked at 200+ active insert campaigns across electronics, beauty, supplements and home categories, comparing the top-decile scan rates (4%+) against the median (1.4%). Five patterns separate the winners.
1. A single QR code
Cards carrying one QR outperform cards with a QR plus social links plus a website URL by ~3x. Attention is zero-sum on a 88×55mm card.
2. The offer in six words or fewer
"Activate your 12-month warranty" — scannable in one glance. Top performers average 5.2 words in the headline; median cards average 11.
3. Warranty framing over discount framing
Warranty and care-guide hooks out-scan discount hooks 4.6% to 2.8%. Customers scan for protection they already want.
4. Brand-first design
High performers look like part of the product experience — brand colors, product photography, heavy stock. Cards that look like coupons get treated like coupons.
5. Compliant copy (the survivors' bias)
No stars, no "positive", no review-conditioned reward. The non-compliant cards that briefly out-scan everyone don't stay in the dataset long — their accounts do not survive. The rules, in plain language →
The placement mistake
Almost everyone puts the card in the documentation sleeve, where it reads as a manual. Winners put it face-up on top of the product — first thing seen, before the product itself. That one change moved a home-appliance brand from 1.1% to 3.4% with an identical card.