They call it “dark traffic” - ads that are not seen by tech-savvy users who have excellent ad blockers.
Not surprised that its growing. The web is unusable without an ad blocker and its only getting worse, and will continue to get worse every month.
I’m sorry for being a broken record in this thread but holy crap yes! Right now you can embed a static ad in a web page relevant to the page’s content and adblockers will not block it!