Are you all using fraidyc.at ?
I was looking for an RSS reader for a specific blog, and my first reaction was to search on subreply. So I saw your post and I just started using it. However I never used RSS feed before and I don't really what I could use fraidycat for, except for this particular blog.
Great that my random question was of some use after all. You can follow much more than just RSS feeds with it, which is why I like it so much. I follow people on Instagram, Twitter, Mastodon and Twtxt via Fraidycat.