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Well, sure, *if*. If the grocer isn't part of a heavily consolidated industry where competition is a distant memory and where grocers routinely collude to fix prices. If the grocer doesn't have to worry about competitors, why would they use e-ink tags to lower prices, rather than to *gouge* on prices when demand surges, or based on time of day (e.g. making frozen pizzas 10% more expensive from 6-8PM)?

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