[thrwyoilarticle]

>Anything beyond that, your value per employee drops drastically

True but not fatal. Being equal to the first employees isn't a requirement: as long as the employee creates more value than they cost, it's worthwhile. Facebook is a simple premise that could be (and was) created with a skeleton team but it's still worth hiring the person to work on Linux's networking stack if that enables them to make it more efficient.