It makes no sense to not let the site online in an archived form, for the posterity It wouldn't even be a significant cost and ads would recoup it anyway There should be a way to donate a website to the Internet Archive so that they run an online archive on it, basically keeping the site frozen forever (rather than relying on the Wayback Machine which has worse UX)
There's no way they'd give up the ads dollars they get from he existing stuff... That makes no sense