> a) The original "kicking out" was from Mozilla Corporation, not the Foundation.
The corporation is a subsidary of the foundation so the distinction between them is lost on me
https://en.wikipedia.org/wiki/Mozilla_Foundation
https://www.mozilla.org/en-US/foundation/moco/
> Thunderbird will leave if and when it becomes in our mutual interest to do so.
As soon as they think they can get away with it they will withdraw key support e.g. infrastructure and so on. This is just my opinion based on how it goes with SeaMonkey. Few devs and only a small community left so everything goes here. Makes sense for them from a monetary point of view and that is all what they care about.
FRG