The author describes how providers of free online courses are officially in the headhunting business, bringing in revenue by selling to employers information about high-performing students who might be a good fit for open jobs. Coursera, which works with high-profile colleges to provide massive open online courses, or MOOC's, announced its employee-matching service, called Coursera Career Services. Several high-profile tech companies have already signed up for Coursera's new employee-matching service. Udacity offers a similar service. Udacity works directly with professors to offer courses, rather than signing agreements with colleges.