What's the current, up-to-date way to implement a secure, rewarded ad system in PlayFab? I've found some other questions but I think the newest of them was from 1 year ago.
What we want in our game: Users should be able to watch video ads and gain items/virtual currencies as a reward.
Edit: I've found the following resource about Unity Ads:
http://unityads.unity3d.com/help/resources/s2s-redeem-callbacks
According to this, we'd need to send a callback url to Unity so they can register it to our app. I'm not exactly sure about how to proceed with this. What callback url can I give to them? Only public access to cloudscript is through ExecuteCloudScript API, isn't it? They also require the callback's response to be in a certain format. How could this feature be implemented?