Ads and anti adblockers seem especially out of place on a .org site, perhaps because the TLD was "originally intended for non-profit organizations or organizations of a non-commercial character"[0] (though such provisions were never enforced and now apparently completely absent).

Speaking of adblocker blockers, Nano Defender[1] is quite effective at blocking them.

[0] https://en.wikipedia.org/wiki/.org

[1] https://jspenguin2017.github.io/uBlockProtector/

Non-profits still need money to operate. I don't think there's anything inherently contradictory about a nonprofit using ads for funding.

The notification goes away if you click anywhere in the background where the page is dimmed.

I didn't see that, but it might be because I block JS in general by default.

Like most pages, the "reader mode" in Firefox makes it readable.