Ah, the sunk cost fallacy meets the dot-com bubble - decisions to invest more (both in money and, more often if I read this correctly, in time and expertise) are being made based on previous investment, not future return.<p>As such, these living-dead companies are preventing the release of cash and expertise into other businesses. I would add to this VC concern that many (of course, not all) of those businesses are probably also preventing the release of founder expertise and energy into better projects.