I tried to make it super obvious what public/private and open/closed mean, perhaps the terminology is misleading? should I add a disclaimer saying that messages are not encrypted? I thought that part was clear but I might be wrong.
Discussion
btw, no knock on Chachi.chat. It's a really nice client! It's just that I can see lots of user's using NIP-29 groups thinking that they're actually private, just how most people that use Telegram think it's private. This would be a bad outcome IMO.