It's a good question, and I was about to mention the tragedy-of-the-commons trade-off, but you already did half of that in your final paragraph. The other half

It's a good question, and I was about to mention the tragedy-of-the-commons trade-off, but you already did half of that in your final paragraph. The other half is, that the third-party ad networks themselves are in fact already feeding a tragedy-of-the-commons situation. Somewhere in the whole maelstrom of shitty clickbait websites funded by ads for other shitty clickbait websites. I read an article recently linked here about those weird vague thumbnail image clickbait links (the ones about celebrities, diets and skin diseases, mostly) that appear below low quality articles. They followed the links, and it just led to more and more of the same, but it did so while spiraling downward into a lowest common denominator like way, way lower than I'd have imagined. There's some really out-of-control complex systems (in the systems theory sense of the word) in the guts of the advertising industry and they are already causing tragedy-of-the-commons situations way before, and regardless of, people using ad blockers. Disabling the ad blocker is not going to help fix those (they'll just gobble up the extra profit). And even then, to (personally) answer your question, yes I think using ad blockers is a net benefit if it keeps those systems at least somewhat in check.