Anything that makes it easier for the common person to buy, sell and use dash is a very welcome development. My only concern is there going to be a way for users to fully control their private key account or is this more along the lines of deposit what you can afford to lose? Knowing that dash operates on a security spectrum, will this proposed service have a similar spectrum?
Good question - you would control your own DASH in your own wallet. When you are ready to add funds to the card, it gets converted to fiat.