Another thing to mention is that Google reports its Network Members revenue as a gross revenue, not their cut. It would be like eBay reporting $80b in revenue,

Another thing to mention is that Google reports its Network Members revenue as a gross revenue, not their cut. It would be like eBay reporting $80b in revenue, not their cut ($8b). So, Google in '14 reported $14 billion in revenue for Network Members, but 70% of that is sent to publishers. Their 'real' revenue would be around $4 billion. On the other hand, ad revenue for Google websites (search engines) was $45 billion. Google makes many times more money from its search engines than all the publishers in the world on Google Network Members combined. That's a cash cow.