Facebook, Twitter, Instagram, etc, are primarily networks of personal (or corporate) identities. The centerpiece is the user. HN and Reddit are primarily ranked

Facebook, Twitter, Instagram, etc, are primarily networks of personal (or corporate) identities. The centerpiece is the user. HN and Reddit are primarily ranked lists of interesting URLs. I don’t know one user from another, apart from a handful of prolific users, and half the accounts start with “throwaway”. (It wasn’t so in the beginning, but even then there was no reason to go to someone’s user page.)