Love all of these case studies. People run around talking about "growth hack this" and "growth hack that" and then talk about SEO and Facebook. It's nice to see some actual examples where companies gain some deep understanding or glean some unique insight that totally changes the way they think in order to gain an edge.
I'd like to see material like this presented along with the failure cases and an analysis of why they failed. I expect there are many cases where businesses will fail even though they do things "right" just because dumb luck. This reminds me of the TED Talk about medical journals only publishing affirmative results.