Angel investor Nat Burgess questioned when the kiosks would become profitable.

The start-up will would not disclose specifics on its user base, but Carrigan said MobileQubes is a high-margin business on inventory, and "to keep an R.O.I. timeline of less than a year, we really only have to generate about four transactions per day". In addition, Carrigan told CNBC the start-up leverages the screens and kiosk frames for digital advertising.

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