A. If you experience inconsistent rewards, try to watch ads in a different network environment (e.g., switch from Wi-Fi to mobile data or vice versa). Sometimes, connectivity issues can affect ad rewards. Also, ensure that your app is updated to the latest version, as updates may fix bugs related to ad rewards.
B. Keep track of the ads that do not reward you and try to avoid those specific ads in the future. If the game allows, report the issue through the in-game support feature to help improve the ad experience.