Musk became increasingly frustrated with the companys practices, especially the way it relied on an aggressive sales force that was compensated by commissions. Their sales tactics became like those schemes that go door to door selling you boxes of knives or something crappy like that, Musk says. His instincts had always been just the opposite. He never put much effort into sales and marketing, and instead believed that if you made a great product, the sales would follow.

Elon Musk by Walter Isaacson