AC is right. Instead of 'running ads', you are the ad.
Also, you're assuming that every site exists to sell a specific product. In my case, I ran a pure service in which users (who are generally less-militant against ads for games, peripherals, and at least somewhat tolerant on "related" products like snack foods) could track and compare their progress on a popular gaming service.
I did it for fun initially, but the numbers I gave from my original post weren't pulled out of thin air; this actually happened. I needed hosting, I needed hardware, I needed consulting (because my DB modeling skills were terrible). While I actually did end up paying out of pocket for my hosting during its final year, I never could have scaled with demand without advertising. Being an uninterested third-party, it's easy to say "well your site didn't deserve to exist", but I am confident you would feel differently if it was your own blood and sweat at stake.
The point of all this is that not every site is equal. Not all of them are click-bait, copy-pasta "journalism", or someone's blog about their cat. There are many people out there doing labor-of-love projects that, for whatever reason, end up being useful for a number of people. Some of them have the ability to monetize them into products, like games and what have you, and others may make the end-user the product (Google, Twitter) - but there are others who may not have that ability. In many cases, advertising is simply the best and/or only business model that is viable. The web is vast; these sites deserve to exist, and there is room for them to do so.
Actively boycott those who you feel are taking advantage of its users (80 ads on a page, bad ad networks, etc), but don't damn the entire system. People willing to pay to get their message out has worked for hundreds, if not thousands of years. There's a huge difference between that, and 'punch the monkey' shit that started this 'war'.
[* Sorry for potentially putting words in anyone's mouths, I'm basically covering all the bases from every conversation I've had within ad-blocking threads on Slashdot - You can see my post history]