Until the next Google?
The thing that is scary about Google is they have unlimited pockets. They can just continue throwing money away until they've taken over every market they care to. And then they can recoup those losses...
20 years from now you'll wonder what you were so afraid of. Google is in its golden age, but it won't last forever.
If you can't know what the actual value of the service is, how can you make decisions about who is cheaper? Is bing cheaper? Maybe, but what about after you consider the vastly decreased exposure? How much does that matter?
I still think the only way to beat google today is to make a better search engine. Tomorrow that wont work either.