A Cash-Free Caffeine Buzz from Starbucks

摘要

Since May, Penn State student Sarah Espinoza has been hitting her local Starbucks in State College, Pa., for double-tall, no-water soy dirty chais two to three times a day, about double her usual rate. This spring she downloaded a Starbucks mobile app that lets her pay with an iPhone 4S and notifies her of special offers. "They send me daily specials, and that makes me want to run to Starbucks," she says.