"topical channels or feeds"
Which leads us to hashtags, which leads us right back to Mostr, because any time you do a hashtag search for anything that's not #bitcoin or maybe #plandemic, you get nothing but Mostr posts.
Then users interact with these posts thinking they're talking to real people on Nostr, which they aren't.
I'll say it again: either fix the bridges, or put a big sign on them saying "out of order" ๐งโ๐ง