You've basically described signal/WhatsApp groups. I'd be keen on any kind of social network that is end to end encrypted, decentralized and puts the user in c

You've basically described signal/WhatsApp groups. I'd be keen on any kind of social network that is end to end encrypted, decentralized and puts the user in control but the more centralized and the more you (the person running it) can see or potentially change what goes on inside it the less interested I am. IMHO social networking needs some heavy disambiguation, too. Speaking candidly to my friends and publishing stuff to the world are two entirely distinct use cases that shouldn't really fall under the same umbrella but on, say, Facebook it does.