>In a lot of cases, those sites get a lot more money from the advertisers than you would ever be willing to pay, because they simply don't provide that much value to you.

90% amateur blogs make no money what so ever over the cost of running them. Smart bloggers switched to affiliate schemes ages ago. Amateur bloggers making money of ad shows will go out of business sooner or later, regardless of adnauseam or adblock. Running ads is simply not a suitable business model for such guys.