Earlier quoted context omitted.
But ads don't provide money until clicked on. So there's no money lost by implementing ad blocking. The only real thing lost is the potential that someone will click on the ad.
That depends on whether the ad is sold based on conversions, clicks, or views. All three models are in use on the web.
There are notable exceptions to this for bloggers who can get hundreds of thousands of views on a regular basis - but most people are lucky to get a thousand unique views.