I found that interesting too. Not a Kagi customer yet but I always feel the need when googling to be able to blacklist SEO spammers, and that would include Pinterest as an image SEO spammer.
But blocking political sites you don't agree with? I don't get it, it's not like they are polluting my search results.
There's "don't agree with" and there's "website is known for spamming false information". Fox, breibart and daily mail all fall into the second category, whether you agree with their political ideas or not.
I think there's another commonality in the 'lowered' sites that has nothing to do with political leaning. Especially for the top two lowered ones (foxnews and dailymail)
You don't go there for news. You go there for your daily set of outrage and panic.
They are news sites, not political sites. Maybe some people do not want them in their news searches because they consider them low quality, or for some other reason I guess?
I would def not consider sites like dailymail.co.uk a good source of information.
The Daily Mail and Fox News are more purveyors of fiction than anything else (just ask News Corporation’s lawyers if you don’t believe me: https://www.npr.org/2020/09/29/917747123/you-literally-cant-... ). Many people, on searching for current events, prefer news to news-based fanfic.
But blocking political sites you don't agree with? I don't get it, it's not like they are polluting my search results.