Regarding Udacity's business plan:
In June Thrun "took the next step: cofounding KnowLabs... He pulled in David Stavens... as CEO… Thrun decides that KnowLabs will build something called Udacity… Stavens is thinking about potential business models. Though Thrun cringes at the notion of charging students, people might eventually pay for add-ons—say, TA services, study aids, or offline materials. He also considers other revenue streams. Near the end of the term, he emails his top 1,000 students, the ones with perfect or near-perfect scores on homework and tests. The subject: Job Placement Program. Thrun solicits résumés and promises to get the best ones into the right hands at tech companies, including Google. A recruiter who places a hire typically earns 10 to 30 percent of an engineer’s first-year salary, which might be $100,000. Stavens figures he could charge much less. After all, KnowLabs discovers talent in the course of doing business."[1]
[1] http://www.wired.com/wiredscience/2012/03/ff_aiclass/