I have recently migrated to freemium model and can confirm that I am only getting build version (not app version). So I have set the build version to a high number like 11 and it works. Original purchase date also seems to be working, though I am getting some 2013 users but my app has been around since 2012. My own device through which I bought the app reports 2018, which seems correct.
Topic:
App & System Services
SubTopic:
StoreKit
Tags: