Anyway, to answer your questions.

1. I haven't heard of it. I haven't tried it.
   • Cons: It's very likely insecure relative to Signal. If you haven't read the code and confirmed otherwise, at least with signal you can be certain other people have read the code given its popularity. It's very likely less reliable than Signal given it's using nostr which tends to store things less persistently and relays have variable performance/uptime.
   • Pros: It's new, ie fun. It uses nostr, ie interop if you're doing other things on nostr and could resist censorship better (if you don't trust that signal decouples id from messages effectively). It claims to use spaces, ie you get a human readable identifier that's stored on bitcoin.
2. It uses nostr relays (ie interchangeable and generic communication points) for storing messages and stores the names as data on bitcoin. Regardless, "decentralized" is usually an overstatement. It might be safe to call it distributed because you can use more than one entity's servers.

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