I received a notification from Jive 2 weeks ago about the Jive Private Preview Data Refresh process and that the due date was April 29th to opt in for a data refresh (copy our latest prod data to our preview instance).
Given the latest update that the preview instances will be upgraded to 2016.2.0 later than planned, is there still time to opt-in for the data refresh?
It sounds like you may be on the automatic opt-out list, otherwise your site would be considered automatically opt-in (no action required). Your notification email should clarify this. Please submit a support case in your private Jive Community customer group and our Account Support Team can help verify if you're still able to participate.
I hope this helps. Let me know if you had further questions on this.