@neomorph Agreed, it's a cool idea. I hope it becomes active again.
We have messaging apps -- Signal, WhatsApp, Wire -- that do an excellent job of hiding the content of users' messages. But there aren't many messaging apps that effectively muddle the metadata.
So I find messaging apps like Ricochet, Bitmessage, and Pond really interesting. Sadly, not much energy is going into them at present.