Is it to look relevant ? Yahoo has a ton of services, a ton of engineers and apps that could do better if they were made better. Yahoo still feels like it is 1999. Why not work on yahoo mail and make it relevant ? groups and make it relevant ? what about their ugly homepage ? I mean there is a ton of things to do, instead of buying things like Tumblr.
Marissa is cute and intelligent , but what's her strategy for Yahoo? At that rate , she'll be out in a year.