Thats right, I have a Samsung Galaxy SII with 2.3.6. It surely has something to do with do with the Android version. When I tried in a newer version of Android in a Samsung Galaxy SII I didn't get any ads, the same happened when I asked to people of other countries if they could see the ads, they replied 'no ads...'. I do get tons of requests and impressions (Which is odd because the ads are not appearing) I attached an image to show my AdMob screen, the app above (Cloud Run Testing) is with your integration and the one below (Cloud Run Android) is with Stencyl's integration via AdWhirl.
I used your implementation in a version I released yesterday, so if someone can test it out and tell me if they get ads that would be nice
Note: In '
Testing' the eCPM and RPM are high and the requests are low because It wasn't a public released version and I testing clicked on my ads, don't take those values as a guide, just know its working.