A lot of games have the ability to double or triple the rewards gained from a play cycle if you watch an ad and I would like to implement this in as server-authoritative a manner as possible.
It seems like what I would want is to create a container with X (the reward amount) coins in it and then open it if they watch an ad. However, it looks like containers have to have predefined items (or potential items in the form of a drop table).
An alternative that comes to mind is to create an entity object that writes down how many coins should be rewarded, then have an endpoint in my server that redeems it upon completion of the ad.
What is the preferred/recommended way to use PlayFab as part of a transient reward cycle?