Agreed. In particular, I'd say that most social media relies on highly prolific posters: the people who produce the most content are also naturally the most val

Agreed. In particular, I'd say that most social media relies on highly prolific posters: the people who produce the most content are also naturally the most valuable for making people want to be in-network. If you charge to read, it's hard to build an audience. If you charge to SEND, there's not going to be anything for the audience in the first place.