BluePhaze
on CocoonJS: Services > Ads you will see:
- Apple AppStore
- Google PlayStore
- Amazon
so you should have MoPub ID for each appstore;
same with AdMob: one banner for Google Play, one banner for iTunes
with Amazon I don't have knowledge
about iTunes: remember that if your app is for kids younger than 13 years old, then you should have some kind "parental gate" (google it)