Advertising always corrupts the goal of the search engine, which is to try to give you the most important stuff, not the stuff someone paid there to be there.
Movies you pay for - well, sometimes they throw some ads at the beginning now - but generally you pay for ads. And that business model - actually, much more ancient, paying for stuff - is much more straightforward in terms of the incentives of the people who are then giving you the stuff.
Hitler had this understanding that you speak to people's deepest, darkest emotions and give them voice that can be incredibly effective.
You know, it's so funny that the internet's become a series of traps where you do sort of innocent things like give your name or address or indicate a preference, I like this thing, and then therefore you open yourself up to a deluge of advertising based on those stated preferences.
Google - and some of the other sites, YouTube and, you know - Google has an amazing search engine. The map product is incredible. So there's a sort of exchange when you put up with a bunch of ads. Facebook basically gives you access to your friends who, in theory, you had access to already. So sometimes I don't really understand the deal, but I guess it makes it slightly easier. So that's their contribution.