> Of course the more likely someone is to want to pay to hide advertising,
> the more valuable they're likely to be to advertisers...
I actually tend to disagree. The small minority of folks who use AdBlock or NoScript to block ads are much more likely to get annoyed with an advertiser and actively avoid their products. Advertisers *should* want to get their ads in front of people who are likely to be ad-friendly or at worst ad-agnostic -- getting them in front of those that are ad-antagonistic is likely to backfire.
I am skeptical that the minute reduction in traffic due to AdBlock and the like is making any real impact on ad revenues either. Certainly it's worse for sites with tech-savvy readers (more likely to use blockers presumably), but makes very little impact on mainstream web advertising, I suspect.