Hi :
I just spend all day try chartboost today .
Here is my personal result. (My country is in Asia)
The fill rate of Android are not very good out side of America (Compare with Revmob ) . Today I try it on 5 android devices. first , it show ads ok . after 1 hour it always show
Chartboost: shouldRequestInterstitial Default?
Chartboost: didFailToLoadInterstitial Default?
I spend a lot time to find what’s going on . after few hours , it working again for maybe 30 mins .
In iOS , the status is better then Android .
Tonight . I try it via US VPN . It work fine . even on Corona simulator it works.
I really no idea what’s the rule . all I can sure that iOS in USA will be work well .
So, If I suggest others have backup ads solution on android app out side of USA , If Chartboost fail to load ads . you can switch to other ads.