Moxie forbids you from distributing branded builds of the Signal app, and if you rebrand he forbids you from using the official Open Whisper servers. Because his servers don’t federate, that means that users of Signal forks cannot talk to Signal users. This is a truly genius move. No fork of Signal4 to date has ever gained any traction, and never will, because you can’t talk to any Signal users with them. In fact, there are no third-party applications which can interact with Signal users in any way. Moxie can write as many blog posts which appeal to wispy ideals and “moving ecosystems” as he wants5, but those are all really convenient excuses for an argument which allows him to design systems which serve his own interests