The problem Nostr is having, for its social-media use case, is that it's not transparent where the actual socializing is occuring.
Too much focus on analyzing the visibility of original notes and not enough on analyzing the quality of the replies.
Discussion
Mew meeew miw mew!?
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That's why it seems like a dead space, unless you follow the right plebs.
And, as soon as you follow them, your feed explodes in interhuman conversations.
The two metrics don't overlap here because so many big accounts are migrations or links from other platforms and not accounts grown organically here.