To be honest, even if every ad were a "good ad", that is to say, if we could guarantee with 100% accuracy that every ad would be unobtrusive, malware free, targeted to things that are relevant to me, without invading my privacy or tracking me, then I'd still keep an ad-blocker installed. The simple fact is that I use an ad blocker because advertising is ubiquitous, and it works- that is to say, it has a measurable psychological affect on the people who are exposed to it. I would vastly prefer to minimize my exposure to things that are trying to convince me that I need things, or make me afraid that I don't have them.

I'd be okay with paying some sort of nominal fee to support a site that reliably has content that I like and is appropriately valued, but those opportunities are very rare. I've occasionally donated $5 or $10 to sites that I use that, when you are using an ad blocker, replace an ad with a message that says something to the extend to "hey, since we're not getting ad revenue from you, would you mind chipping in?". I've never subscribed or disabled my ad blocker for a site that tries to hold it's content hostage, and I can't imagine paying for sights that want $20+/month for a subscription.