If I specify an Hacker News comments page into the Universal Summarizer, like https://news.ycombinator.com/item?id=40525249 , I get "We are sorry, we are not able to extract the source.", e.g. https://kagi.com/summarizer/?target_language=&summary=takeaway&url=https%3A%2F%2Fnews.ycombinator.com%2Fitem%3Fid%3D40525249
A few months ago I was getting a summary of the discussion within that page.