Yahoo is a public company and they are already facing heavy pressure from activist investors (i.e. quick-buck artists who want their profit locked in now). Yaho

Yahoo is a public company and they are already facing heavy pressure from activist investors (i.e. quick-buck artists who want their profit locked in now). Yahoo had some leeway to try new things when Mayer was hired, maybe even things with a longer term payoff as you're suggesting, but, well, buying a revenue basket case like Tumblr was the main thing they got around to doing.