LOL right. The alternative would be like trying to use Pay at the Apple Store and no employee being trained to use it, or know how, or even that they have it.
Why would you even question this? I suppose it's possible, but Wal-Mart seems to be rolling this out methodically, why would they risk it failing because they just leave it up to their minimum wage part time workers to figure it out on their on?
Wal-Mart may be cheap and heartless, but they are a very effective, well organized business. They have a captive audience and cashiers able to implement the new system effectively. If they weren't training them, why bother having test markets? Just flip the switch worldwide and hope their employees get up to speed ...
So yes, unless they are complete idiots, Walmart has a significant advantage over Pay in adoption.
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You shouldn't feed the trolls. ;-)