Nice. Incidentally, I found https://siftrss.com/ https://siftrss.com/ , which lets one do string-based filtering at the level of creating a new feed based on t

Nice. Incidentally, I found https://siftrss.com/ https://siftrss.com/ , which lets one do string-based filtering at the level of creating a new feed based on the old one, which means you can plug it into your existing reader.