I don’t know… The ads on CoG games make almost no money at all according to my royalty statements. Most fremium games make their money on whales, not ads.
Google’s take is from compiling all the behind the scenes data points that make us individuals - the actual ads are not their game but rather the marketing of their accessibility and targetability … their ultimate goal is to remove the middlemen of “Mad Men” Madison Avenue and be the controller of everything.
Okay I skimmed all of this, and I guess long story short…
it looks like “pay” games get better placement than do “IAP” games, both on Android devices, and even on iPhones and PCs
but other than the above, and new games going to the front, the rest of the ordering seems mysterious