What does make chief negotiator/demand negotiation rights do?

[Birken]

I have not tried it either, but it makes me wonder if you could dog pile the blob, get negotiation rights from all of them, and then allow offer subjugation for all of the clans. It sounds strange, and I cannot think of a reason to do this, but would it be possible?

The other peaces will only result in white peaces.
The current AI will not use negotiation rights as it was primarily intended for MP and can be exploited too easily by the player.