Why as as late as just last year I was able to do this and you did it within just days of My request, Are you not able to do it Now?
My guess is they have made a lot of back end changes database wise and haven't found a cost effective way to do it yet.
We still don't have a solution for this, and it's still on our list of things to do. Unfortunately I don't have an ETA for it, but I will most definitely provide any updates I have as they become available.