The Risk Classic rules do not seem to specify if territory cards drawn by players are kept face-up or face-down. I can't seem to find anything about this from my research and I was wondering if anyone could clarify on this?
Edit: Thought I'd add some quotes from the official rules for reference.
"Earning Cards" doesn't seem to specify if the cards are drawn face-up/face-down and if they are then proceeded to be kept face-up/face-down.
Earning Cards. At the end of any turn in which you have captured at least one territory, you will earn one (and only one) RISK card.
The only reference to face-down cards I can find are when the player has traded them in.
For quick reference, keep traded-in cards face down under the bottom edge of the game board to mark the value (in armies) of the next trade
The only advantage I can see to having open-information card drawing is you know if they will be getting reinforcements on their next turn since the number of reinforcements you get scales according to the number of traded sets which is open-information.