Recently I tried to add https://blog.newsblur.com/ as an RSS feed to see new Newsblur blog entries. Unfortunately, Newsblur does not automatically extract an RSS feed from https://blog.newsblur.com/. I since saw the proper URL is The NewsBlur Blog.
You may want to have Newsblur extract the blog feed automatically from blog.newsblur.com if that is “fed in” as the URL for detecting an RSS feed.
Might also want to have the blog as a “default feed” for new Newsblur subscriptions, if that is not done already.