Udacity is the perfect e-learning platform for people who want to hone their computer science skills. From programming and artificial intelligence to product management, the company offers courses in various specific job skills that can be completed within a few months. Prices are steep, though. A monthly subscription costs $399, but you can get a 15% discount by paying it all upfront. Additionally, you can answer a quick survey to enjoy a personalized discount that can go up to 75%. Another way to get this generous discount is to cancel your account. To keep you as a customer, Udacity will offer you a discounted rate for all future payments. Udacity provides more than 200 courses at zero cost, and you can test the platform risk-free by taking advantage of the company's refund policy.