But these are three companies that are doing well enough that they can afford to take on failures. So something doesn't work at Google; the company's got enough

But these are three companies that are doing well enough that they can afford to take on failures. So something doesn't work at Google; the company's got enough revenue that they can absorb the failure without a huge problem. If you're running a small startup and it doesn't work, taking a hit is a lot more costly.