Just wanted to say that I found a very good forum thread explaining how/why to use 2 different usenet providers with an easy to understand diagram. I didn't want to re-post it as its not my content but I think it makes for an excellent read for usenet newbies: https://nzbgeek.info/showthread.php?tid=6720
Additionally see this wiki for usenet providers and re-seller listing to make it easier to find a backup provider on a different backbone: https://www.reddit.com/r/usenet/wiki/providers
Additionally see this wiki for usenet providers and re-seller listing to make it easier to find a backup provider on a different backbone: https://www.reddit.com/r/usenet/wiki/providers