Originally Posted by krazykanuck

I'd posit that it's more of an issuer trusting WM deal, rather than a Simon/Citi thing. Back when I got my ST Delta debit card, ST would lock my debit card after every single MO purchase at WM. Granted they were always $1k+ but I got tired of calling in and unlocking the card. I assume V/MC see a larger than usual amount of fraud/chargebacks/etc at WM given the normal clients it serves. I use the card for the same spend to buy MOs but at a grocery store instead of WM and they have not locked it once.