This was broached recently and some information was provided about an issue with the draughtman's box popping key not creating gems as often as they should have.
However the specific and most relevant part of this issue went unanswered.
Does using a vardite key to instantly unlock a box skip over additional loot generation that happens from picking multiple locks on a single box? If it currently works this way, is it able to be changed to allow the full potential value of the loot from the box be generated?
Since the key is something you are selling right now I think folks myself included would appreciate knowing the intentional or unintentional consequence of using this cash item.