They knew he was going to leave. It's likely a combination of the following: 1. They couldn't fire him as an employee (or felt it was an overreach of their man

They knew he was going to leave. It's likely a combination of the following: 1. They couldn't fire him as an employee (or felt it was an overreach of their mandate) 2. They wanted to signal a clear distinction that they lost faith in him as Chairman, while not losing faith in his work as an employee. 3. They felt like it would play better with the company if his ultimate departure was his decision rather than theirs. 4. Mira, as the new acting CEO (and someone who had nothing to do with the actions), declined to fire him even though she knew it was ultimately futile.