C# 有没有办法找到从unity的广告中赚到的钱

假设一个用户看了一则广告，我想根据我从广告中赚了多少钱来更改奖励。我不想使用ecpm，因为这是一个平均值。我想从一个特定的广告中赚钱。我使用的代码是教程中默认的unity广告代码。给你

    const string myPlacementId = "rewardedVideo";
    public bool testMode = true;
    void Start()
    {
        Advertisement.AddListener(this);
        Advertisement.Initialize(gameId, testMode);
    }
    public void Update()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            ShowRewardedVideo();
        }
    }
    public void ShowRewardedVideo()
    {
        if (Advertisement.IsReady(myPlacementId))
        {
            Advertisement.Show(myPlacementId);
        }
        else
        {
            Debug.Log("Rewarded video is not ready at the moment! Please try again later!");
        }
    }
    public void OnUnityAdsDidFinish(string placementId, ShowResult showResult)
    {
        if (showResult == ShowResult.Finished)
        {
            print("finishedAd");
        }
        else if (showResult == ShowResult.Skipped)
        {
            print("skip");
        }
        else if (showResult == ShowResult.Failed)
        {
            Debug.LogWarning("The ad did not finish due to an error.");
        }
    }

提前谢谢