Hi,
I have added a trello task for it:
https://trello.com/c/SZPlgBUn/152-unity-iap It will be supported, but not right away. I personnally tend to wait at least for one big revision before commiting to create some bridges, because the api may change, or the process may change, it happened with all modules, Mecanim, UI, pathfinding, and so I would be patient and use existing iap for production.
And the on top of that, I am running behind quite badly
so make yourself heard on the trello board to bring attention to this and get it done quicker.
Bye,
Jean