> I'm in awe that some sales person was able to sell Walmart, Target, BestBuy, CVS and all these other stingy retailers on a payment system like CurrentC/MCX.
It's not as hard as you'd think. I previously worked for a start up that sold Walmart on a POS system that was absolutely terrible (the codebase didn't even have any tests). The big retailers like Walmart have a sort of "throw money at everything and see what sticks" approach to technology. They regularly sign contracts to try out new tech but only in one or two stores. If it works well, they scale up to more stores, but that almost never happens.