Yikes, thank you for the warning. I sent 2 Heroes in mail to same account last night. I was going to send them back later today... I think I would have cried a lot.
It's most definitely (or at least has been) broken. I tested it when I only had ~200 AD to my name and collected 600 in the gateway... when I got home I still had ~200 AD and 0 RAD.
As a <font color="orange">HAMSTER</font> disabled veteran software-gaming architect founder - I find this all very amusing. Besides, it's CLEARLY QA's fault.