You can use them when ordering items from the DJI online store, I did this a few weeks ago (some Mavic goodies) and received items in a couple of days from what must be a European distribution point.
Only problem is that they cannot be used to cover postage charges. For me this wasn't a problem as my order was free delivery.
Just think!! Yeah, them drones of the future will likely be operated through our mind control.
I want one that can change color. I would like to have a Black Light Spotlight too.