An insider finally has a revelation that some outsiders already understood:
So I left the company a year ago along with some of the top minds in display monetization, most of whom ended up in places like Facebook, LinkedIn, Twitter and other direct competitors to Yahoo.
Marissa should have embraced these bright minds and incorporated their expertise and knowledge into her new native ad and mobile vision. She chose not to and Yahoo display revenue, at least in the short term, suffered as a result.
What I didn’t get then, but understand now, is Marissa most likely made a conscious decision to put the legacy display business on the backburner to focus on building a new, more modern monetization platform capable of driving predictable and systematic long-term growth for Yahoo.