Here you have Bill Clinton, seeking what seems to be an emergency face-to-face with Lynch. Risky.
We learned from Strzok and Page that Lynch knew well in advance that Hillary was going to be cleared of any charges. I would have to think that any promises or deals that Hillary made with Lynch would have been privately made months before.
Then why the tarmac meeting?
Something went wrong.
Lynch is dense and had to be hit over the head. She got the message.
An anon pointed out that the perfect conspiracy is undertaken without communication. The players know their roles, and perform them. Lynch didn't know her role.