Earlier quoted context omitted.
Google basically sounds like a large scale startup incubator where every successful project is doomed to fail.
There's only two outcomes: Either Google gets bored and kills it because it doesn't generate ten billion dollars a year in profit or it becomes so ingrained in our society killing it might cause an angry mob to attack Google HQ with torches and pitchforks. Why it can't spin these side projects off into their own companies to survive or die on their own merits I don't know.
They would only do that if the spinoff made them a noticeable amount of money. I suspect that is rarely the case.