I'm surprised that many people know how to install one although my in-laws have one and have no idea it's there. So is it 52% say they have one or they checked their browser and found one? Frankly I'm surprised 52% of people know what an ad blocker is.
Now about the 1/4 to 1/3 of security professionals and programmers that don't use and ad blocker, WTF?
I consider Mastodon an ad blocker.