So, aren't Amethyst and some other clients open source projects?
I am a big Amethyst fan, and have stayed with it despite some drawbacks, but hearing that it has hidden filters does concern me.
If that is verified (I am not accusing as I have not yet personally confirmed the details) and if it is open source, I would love to see a fork of the client that would remedy the known issues.
Also as a believer in V4V, I would hope that any such fork would honor nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z and company in an appropriate way for the foundational development.