As Facebook keeps accumulating users, and as users accumulate "friends", the SNR decreases and makes the product experience less valuable, notwithstanding the efforts they make to "optimize" the feed. Mine is mostly filled with things I'd rather never see.
Facebook is a social network that mostly reproduces geographic social networks, but that doesn't connect people based on affinities. The people discovery mechanism is close to non-existent. People in your Facebook neighbourhood are people who most likely live in your current, past, or "work" neighbourhood.
Are there any social networks that try to dynamically create communities/"neighbourhoods" based on behavior? (e.g. upvote a post and you get "closer" to the poster, with symmetric behavior for downvoting, and second order effects propagating to other users based on their own upvote/downvote of said post).
Apologies if that's too vague, I'm thinking out loud here.