InMobi SDK provides you the callback in any case, so you could choose not to fill in anything and handle the rewards completely at your end.
For more information on how to create the in-stream video ad, see.
By installing this SDK update, you agree that your Children Privacy Compliance setting remains accurate or that you will update that setting, whenever there is a change in your app's audience. You may update the app's Children Privacy Compliance settings at https://publisher.inmobi.com/my-inventory/app-and-placements.