Frankly I havent tried amazon yet. But a friend of mine (creator of Hungry Hal) said Admob works on Amazon since its all Android platform in the backend.
However, I tested my APK on the Amazon App tester, and it didnt have any issues with the Admob plugin. It only said I cant use Google IAP plugin. I now need to create another version to use offical IAP plugin only for amazon
Also, I heard video ads like Adcolony and Chartbooster will work too But I cant confirm