The beverage behemoth tells Engadget this is a permanent program. You won't be under pressure to have soft drinks and chips at every given opportunity, even if there will undoubtedly be an incentive to pick them when you're satisfying a craving at the convenience store.

This is definitely an uncommon promo, and reflects how online payments have grabbed a foothold. It's certainly easier than converting points or asking stores to pay customers. The question is whether or not people will embrace the program in large numbers. In some ways, this is an experiment to see just how much the snack-seeking crowd appreciates digital money.