Event cc_ecpi has 4 parameters: value (ecpi), adnetwork, campaign and adgroup. This allows you to segment users accordingly with Firebase’s Remote Config and Audience. You can create an audience in Firebase with these parameters. Except for value, the other parameters need to be created custom dimension first to be able to create an audience using those parameters. Guidelines can be found here.
Some examples of using this event to personalise user journey:
By eCPI (Low, Normal, High): AB test interstitial interval for each group
By adgroup: Design multiple creatives with different play mode/theme, then display the corresponding theme play mode/theme for each user.
By campaign: Segmented users from IAP campaigns will not have to watch ads until D7 to encourage them to buy an in-app package.
By ad network: AB test interstitial interval for users coming from different ad network