I’ve sent my current findings off to Zen for a response. I have an article written on how to get the most from the app, just need to wait for comment in case changes are on the way. I’m having almost as much fun with my data as I am playing the app! Kidding. Sorta.
A bit like with some of the major Steam sales when there has been some sort of metagame - the one with the comics to get the red herring badge was interesting, can end up "playing" that, and less of the actual games until the week after!