Anecodotal: a friend of mine worked at an ad tech company (not one of the big brand names, though likely one that's served you ads at some point). He said that

Anecodotal: a friend of mine worked at an ad tech company (not one of the big brand names, though likely one that's served you ads at some point). He said that everyone at their company used Adblock, to the point where it was part of their developers' standard checklist when debugging issues that their clients were having ("first, disable Adblock").