I can fetch the feed form this URL with
curl 'https://b3ta.com/xml/combined.php?rdf=1' and see that there are entries as new as 2020-11-02T19:18:00+00:00 but the latest entry in NewsBlur is 2020-08-14.
Instant Fetch does not cause it to update. Using “Site Settings” shows an OK parse as late as
2020-11-17 20:26:45 OK (200). “Statistics” says “This site has published zero stories in the past month or has averaged less than a single story a month.” but
curl 'https://b3ta.com/xml/combined.php?rdf=1' | grep '<dc:date>' shows two stories per month on average.
I’m new to NewsBlur so I may be misunderstanding something about how it works, but this seems odd.