The PlayFab Unity SDK seems to include InAppBillingService, which causes build issues with Prime31 In App Billing.
AFAIK, PlayFab is not used to trigger actual purchases on the stores, so we were wondering if this reference will be removed, or how we can fix this.
Here's the actual build error:
java.lang.IllegalArgumentException: already added: Lcom/android/vending/billing/IInAppBillingService$Stub$Proxy;