Is it possible to have a NIP that allows people to input their Twitter, IG, FB, etc. credentials and have the posts show up on those platforms too. 

So you post and interact on nostr, but the content flows through to all those accounts. 

People reading your posts get wind of this meta-protocol, start using it, posting to all of them simultaneously too. 

Pretty soon everyone is just posting peer to peer, following each other via the meta protocol and as it improves, you don’t need the middleman anymore.