Interesting. I was thinking most people from the target audience (tech) would have ad blockers installed. I can't imagine being a more or less tech-savvy and not using an ad blocker.
The most popular ad blockers also block W3Counter's tracking script, so those 110K monthly views it counted are just the people not running a blocker. Who knows how many more people visited but weren't counted.
The AdSense ad on the documentation website
It gets quite a bit of traffic -- https://www.w3counter.com/stats/90840/dashboard