Some blockers are specifically created like that. Their rational is a combination of letting the website owners (who embedded the ads) get their money and hiding that they're using a blocker.
Do you have any examples of these types of blockers? I couldn't find any.
FWIW most (but certainly not all) ads are sold in a pay-per-click model, increasing the number of delivered ads only lines the ad network's pockets (who sells them to advertisers as pay-per-view).
I never was in that line of business but afaik websites pay to AD platforms per banners displayed. So looking at AD and not interacting with it in any way is a net loss for a website who placed that AD.