nubis on Nostr: Not yet, I'm focusing on allowing nostriches to monetize their accounts with ads ...

Not yet, I'm focusing on allowing nostriches to monetize their accounts with ads using RSK, so we get paid with DOC for likes and reposts. That will involve verifying nostr event signatures in solidity.

For the group controlled accounts my main use cases would be: a) my company nostr account of which I don't want to be the sole owner.
b) Replacing the current margin call emails from DeFi protocols with nostr, so these protocols don't need to deal with owning a centralized resource.
c) DAO's with centralized governance forums in tools like telegram, which usually have problems with censorship and account takeover.