Amazon and Google are engaging in concrete industries. Google is still the largest advertising company in the world, facebook is not. Facebook has been and will

Amazon and Google are engaging in concrete industries. Google is still the largest advertising company in the world, facebook is not. Facebook has been and will be second fiddle to Google in the ad industry. "His" list wouldn't have included Facebook because they haven't really dominated anything, let alone stretched their arms out into other fields. Facebook can only hold the dimmest of candles up to Google and Amazon. There are giants, then there are titans.