2 August 2015 – By 6 a.m., Sam Clarke is usually already on a call with an Asian tech company halfway around the world. By the afternoon, she switches to calls in the U.S. And until she goes to bed, she keeps an eye on her email. On a bad week, Clarke, a sales manager for a software startup in San Francisco, clocks in about 55 hours. Corinne Ruff. Read more.