Haha well, Nook is totally Niche and only available in US and UK (as far as I know). It's some kind of the same stuff Amazon does with its own reader. But the market itself is very small, not so many apps and the users there are used to pay for apps.
It's a bit tricky to get in for a non US resident but finally all you need is an EIN.
Just wanted to let you know that Paint & Conquer crashes on launch on iPad 3 running ios 7.1.2
Runs fine on iphone 4s ios 8.0 though.
In other news, I'm really bad at this game.
Re. Chartboost vs Admob. I've been surprised by how decent and consistent Admob's performance has been for me.
On Admob I'm getting an RPM on interstitials that's about 60% of what I'm getting on Chartboost, but that's with regular tweaking of CB campaigns, whereas Admob is more hands off.
Plus, as I'm using Admob as fallback, it's basically filling in for when I can't get a Chartboost impression at my requested rate (which lately has been around 50% of the time). If I were to let CB fill all impressions no matter what CPC or CPI, I expect my CB RPM would fall significantly.
Hey, just read this thread and found it interesting. Always fun to hear about how other indie developers do in terms of downloads and stats. Your numbers are very similar to mine. I am making about €120-150 / months on App Store, Amazon and Google Play. (Google Play about 2/3 of sales, App Store 1/3, Amazon negligible). It's been pretty steady at those levels during the 6 months since I released my first, and so far only, game.
In terms of downloads I got between 50-100 / day total.
Trying to figure out how to take the next step. Would need to increase those numbers by about 10 to have any shot at making a living at it.