Some of the podcast-websites that are being linked to from this website might have trackers or ads which is a red flag. See these examples: https://ubuntupodcast.org/, https://teaearlgreyhot.org/ and https://goinglinux.com/. However, you can get those podcasts via that provided RSS-Link, this is why it might be ok to include it into this directory. Maybe 3/5 blocks is appropriate.