"When you “follow” someone, it is a signal that you want to listen to what that person has to say. But just because you follow someone doesn’t mean they are listening back. This unidirectional model is actually a poor choice for a close-ties network because close-ties relationships depend on frequent bidirectional communication."
- https://onezero.medium.com/why-google-failed-4b9db05b973b
This is why nothing in the current #fediverse - including #Diaspora - can replace FarceBook. They're all based on unidirectional follows.