Like Netflix vs. YouTube. Netflix fights for your ability to stream HD videos comfortably because you pay for the service. YouTube crams a perfectly-buffered, crisp HD ad down your throat before leaving you with a video that might stutter or fail to load even at 480p. Sure, people can't complain when it's free (though they do), but I think it really limits what an experience can be, and I don't consider that particularly user-centered.
Anyway, just my thoughts.
Edit: Fixed some parallel structure
The disconnect is there for many videos where a perfectly buffered ad precedes a slow buffering video or something, but they seem to use that technology on some user videos too I think - or something similar.
Due to the nature of how CDNs work the ads don't normally need special treatment.
They simply benefit from being 'very popular videos'. Meaning they stay hot in all edge caches because everyone, everywhere is watching them all the time.
1. The advertisers who pay google get their money from us, added to the prices of the things we buy. There is no free lunch.
2. The overhead cost of advertising is huge and we pay for that too.
3. We pay the opportunity cost of a product that cannot put users first because they live or die by giving advertisers what they want (and what we want indirectly and secondarily). This includes both the cost of lost privacy as well as well as design that optimizes advertising revenue. As has been said, we are more Google's products than we are their customers.
4. We pay the social costs. Democracy and the free market assume people make voting and purchasing decisions based on facts and reason. Advertising as predominantly about manipulation and deceit. I believe this is the most expensive cost of services that rely on advertising revenue.
Added together, we are paying a lot more for "free" web searches and email than if we could just straight up pay Google for straight-up ad-free versions.
[This is a condensed version of a more detailed case with reference links that I made here: https://news.ycombinator.com/item?id=7485773]