This is a cool project - must have been fun to do the research on and build. Are you using any optimization techniques for AdSense? Would love to hear them if you don't mind sharing.
It's great fun, and the research is never-ending. Up to ~1,300 unique 'Days' at the moment, and tons more to research. Loads of months, weeks and years to do too, which have taken a back-burner.
No AdSense optimisation at all; barely touched the account. The most sophisticated it gets is that it's using the async code (which we got access to quite early on), and there's a bit of conditional logic which fires to determine which size to serve based on the viewport width. Love to hear any ideas you have - though AdSense is really a temporary cost covering measure while we grow the email database, develop the app, etc. We'll bin it when we're large enough to move reliably to other methods.