TIme traveler here from Q4 2016.
This trick is excellent and still works. I was able to transfer the ‘value’ from a MasterCard prepaid Debit card which I received as a rebate from a computer component purchase.
I am surprised, but extremely happy to say that it was an effortless thing. This rebate card had all sorts of red tape and restrictions–including a mere 4-month period in which it could be used (and they allow themselves a one month period to even get the card to you).