After Amazon's investment into LivingSocial, the valuation shot into "over $1 billion" http://techcrunch.com/2010/12/02/livingsocial-confirms-175-m... but controlling only 8% of the market, vs Groupon's 79%. It would have been a very expensive acquisition.

For everything else near 0% market share, Google can probably easily get ahead on its own brand name.