Thanks for doing all that work @paulag! I'm also a numbers person and a bit of a statistics geek... this is very cool, and it'll be nice to have as a reference, if you go on and do this on a monthly basis.
Clearly... based just on a brief look at my own stuff... I am much better at "engagement" than I am at "earning" which is an interesting insight for me... and I put a fair amount of effort into creating "engaging" content...
Also, on the $0.00 posts, don't forget that a fair number of those could be "copy pasta" that has been flagged to zero, as opposed to posts that "organically" ended up at $0.00. Don't know if your analysis can distinguish those....