title: Admob a lot request but no impressions
body: <p>I have four apps using admob banner to earn some extra cash. This issues happen on two of my latest release app. The first one got 200 request but only 4 impression. Another one get more worst, take a look at the screen shot below</p>
  
  <p><a href="https://i.stack.imgur.com/DmaEZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DmaEZ.png" alt="enter image description here"></a></p>
  
  <p>When I first release the app to playstore, I got almost 90% match rate. But this happen about a week ago, which i got alot of request but no impressions. So I started asking my friend to download the app and see wether the ad banner do show up. None of the ads show up on their mobile. Did anyone experience this kind of issues?</p>