For wildly different reasons. GitHub is free for individuals and small teams so that big corporations feel compelled to use their products, since all of their

For wildly different reasons. GitHub is free for individuals and small teams so that big corporations feel compelled to use their products, since all of their employees are accustomed to those already. I'm less familiar with the financial workings of y-combinator but it's a great PR move and a recruiting tool. Someone more familiar with the matter might be able to expand on this.