The 8-year-old company sold 11 million devices in 2014 alone. The company is expanding its corporate customer base, announcing 20 new customers in the third quarter including GoDaddy.com and BMC Software, who will chip in for tens of thousands of staffers to buy Fitbit devices as part of new wellness programmes. If the Fitbits given out to employees in bulk are hacked, it could be an easy way to get into secure networks.