Not sure I'd say significantly as impressions don't pay nearly as much as if you actually click.
Although I have a Google ads background. Not sure how much you get paid for impressions with these clickbait advertisers.
Relativly low. A client I had switched to these things as their site is relativly techy as such lost a large amount of revenue when adblocker became widespread. ~15% of what Adsense gives for impressions which can be quite high depending on niche.
Problem with Adblock is while it may block the annoying ads the only ones that will actively try and get around it are going to be the ones with malware/scammy things. Legitimate publishers don't tend to bother. Iirc Adsense actually prevent you from circumventing adblockers or even asking the user to turn it off.