In that area. After No it changes. When #11 and #3 (former Chloe) get the Vibrating Anal Beads, #11 gets it earlier and after both have them, #11 still makes 80% of income alone.
You see the differences in the item multi. #11 gets a 25 with the hat and #3 a 22. With the Beads they both get a 20 and #4 gets a 25, but that is not enough to catch up.
Now that would be interesting. I could be plausible. Since, why do they make it possible to open lower chests anyway? I attributed it to the game still being unfinished.