A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate
in the Unity community.
Unity now have apk download ads in China, hence can explain the impressions.
But eCPM is affected by impressions, views, clicks, and...
Pls check out this article about Unity Ads GDPR Compliance implementation:
Could you send the problem you met to
We'll look into it for you.