Remember, about nine months ago, when the battle between Google and Uber in self driving cars was just getting going. When Google’s Dave Drummond had left Uber’s board, and smart commentators were handicapping a battle between a company with maps, a technology lead, endless capital, a publicly traded stock, and a wildly profitable core business to support long-lead investments in uncertain new areas and….Uber.

The "5 tech giants" infographic is worth checking out. Google/Alphabet is 88% ad revenue. Facebook is 97% ad revenue.