{"page":"/blog/financial-media-network-measurement","modified":"2026-11-10","license":"https://creativecommons.org/licenses/by/4.0/","columns":["Problem","What goes wrong","What to ask the network"],"rows":[["Card coverage","Purchases on other banks' cards, in cash or by bank transfer are invisible","What share of category spending your data sees, and how you treat the rest"],["Merchant matching","The record shows a merchant, not a product; locations and descriptors vary","How merchants are mapped, and whether product-level data exists"],["Offer attribution","Customers who would have bought anyway are counted as results","Whether a randomised holdout is run, and its size"],["Late settlement","Sales, returns and rewards settle days to months later","When results are final, and how restatements work"],["Privacy limits on joins","Advertisers cannot match results to their own customer data at person level","What can be matched, by whom, and with what thresholds"]],"sourceUrls":[[],[],[],[],[]]}