Kagi does let the user adjust the rankings of these sites if they don't want them coming up. While it would be nice to have this done proactively for the link farms, at least the user does have some control.

Forbes did make it on the blocked and lowered leaderboards.

https://kagi.com/stats?stat=leaderboard

DDG gives me:

forbes.com healthline.com medicalnewstoday.com fortune.com

But I usually use site:reddit.com in my searches anyway so it doesn't matter to my personal habits.