| Live Checkout Tests Run |
78.8M |
Real purchase flows with real carts across 2024 & 2025 — not simulated. |
| Retailers Covered |
500K+ |
Breadth of merchant coverage across live test executions. |
| Overall Failure Rate |
26.2% |
Codes rejected at point of transaction. Measured by expert code testers familiar with retailer-specific restrictions. |
| Codes Rejected at Checkout |
~21M |
Approximate count of failed codes out of 78.8M tests. est. |
| Total User Votes Cast |
2.2M |
SimplyCodes users voting on promo code listings across the same period. |
| User-Reported Failure Rate |
87.6% |
Share of votes that were downvotes ("code didn't work"). Inflated by selection bias — shoppers vote more after failures. |
| Gap: System vs. Consumer |
61.4 pts |
Difference between the 26.2% measured failure rate and the 87.6% user-reported rate — showing how disproportionately failure shapes perception. |