I've also been using Tracker since the soft launch. It's a nice clean snapshot of day to day blog performance.
I'm interested to see how the Priceonomics Data Studio concept mentioned in the handbook intro works. It sounds like a good idea, but I do think there will be challenges with outsourcing the Priceonomics content marketing strategy to other businesses.
Someone from Priceonomics can chime in here, but it seems like they have the luxury of identifying diverse topics that are likely to go viral, then go out and acquire data specifically for that topic, tell a story, then move on to the next topic (and perhaps even a different audience).
Other businesses are less flexible. They have to start with a limited amount of data, then use it to tell many stories, week after week.
Not saying it won't work. I'm sure it will. Just interested to see how the data gathering, analysis, and storytelling sides of things all come together in the Priceonomics Data Studio offering.