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Fair enough. But as often: The clone is better the the original as it offers features the original doesn't offer. Namely support for multiple chains.

The only thing that changes is the direction: Why didn't you merge multi chain support back into your project? WhaleVault is available on Github so that shouldn't be impossible.

Being the original project and being a vanity project doesn't exclude each other. It's still a vanity if you don't add useful features for personal reasons.

I don't know the background but sounds like if you want want this whalevault wallet to get better you should hope that hive keychain gets funding since they are apt to use this code base.

Anyway what is the website or profile link of the group creating whalevault... because trust is a big part of being willing to install an extension and there is so far no reason to have that trust in this unknown wallet.

You do you but Whalevault is not even opensource, so 1) I couldn't merge it if I wanted to, 2) you use it at your own peril since nobody can make sure no code is added with malicious intentions.
They do have a github page for reference :
https://github.com/alexpmorris/whalevault
But there's nothing there except a license and a README.

They cloned two years ago so I'm pretty sure we re way ahead in terms of features. That's being said, indeed we don't plan on supporting other chains.
First, Hive Hard Forked couple of times and there are features which are not supported by other chains. Second, except from you, we've never really got any demand for this.