Why Admob Ad not Showing in Amazon Kindle Fire device?

Recently My Ad Mob Stop showing ads in amazon app store. So my revenue is also stop from the 7-8$ per day to 0.5$.

It was working fine since 15 or 16 December, but since than it was not working for any reason. I have also try to update ad-mob plugin , also try unity ads , updated android SDK. But still not getting success.

can any one has solution, so please share here.

yeah me too , same problem i think admob not support devices without google play anymore like Kindle :/, and wen i want to change to amazon ads, again amazon stop support unity in sept