Antoine-Frédéric, now I did, and he's right, as usual. Adversarial interoperability is a beautiful thing. I'm thinking about allowing people to import their data from VK and Facebook in here. That would already go a long way. The unsolved problem, however, is the interoperability part itself. As in, how could we make it such that you could be using Smithereen, while still communicating with your friends on Facebook? They absolutely won't let that happen, even if I reverse engineer the app API or mimic a browser. They'll say that this puts people's accounts in danger or some other bullshit like that.