Of all the attempts trying to revive a genuinely dying tech company, I think share holders would have been better rewarded if they bring a WallStreet CEO, who slices/dices and sells it for best value. (Apple being everest size exception)
She increased Yahoo's value 200%. How is everyone missing this?
Because she didn't. Yahoo's value was the stakes it had in other companies (Alibaba and Yahoo Japan). Mayer had nothing at all to do with their increase in value, and therefore nothing at all to do with Yahoo's subseqent increase in value.
Yahoo's value increased 200% while she was there. Corelation doesn't equal causation.