It's MIT until I decide that it's not, at least that's how I understand how it works. I submitted previous copyright claims which supposedly lead the copycat app to be taken down.
Maybe a naming issue? The code is public domain, but is the bitchat name? nostr:npub1sg6plzptd64u62a878hep2kev88swjh3tw00gjsfl8f237lmu63q0uf63m
Discussion
I just wonder what they have an issue with. The original code from Jack is public domain, right? Your app is under your license, I get that. But is your app also called Bitchat? I wonder if they have an issue with that, since a public figure like Jack has released an app with the same name on iOS.