I've done more of what you do this past month, and while my earnings are sagging, it's been more fulfilling. I am not wasting time writing boostable stories that fail. Instead, I'm keeping things short and sweet. What I find odd, is that even though I had more reads than you, you've earned $250 more than me. Almost twice as much. Your read ratio is slightly higher, I think. Maybe that's it. Or is your FoM status helping? I don't know. I suspect if I upgraded to FoM my stats would be exactly as they would be on the current level of membership. I wish I knew your secret! Well done. :) Always find these things fascinating.
Saying that, $100 a month on submission guidelines and you publishing another 6 stories over what I did, probably brings our comparable results closer.