I'm trying to work out why you would place a card face down in the strategy phase. What is the benefit.What is the disadvantage?
I'm not a quarter master general veteran by the way
I'll give it a shot from my perspective...
Benefit: your opponents can't see what you'll be unleashing upon them later (though they'd have to have super-human eyesight to see the SMALL print!)
Disadvantage: you have to remember what the cards can do for you, or be constantly looking them over to remind yourself. As I'm getting up there in age, I keep them face up... and remember the SMALL print? I don't have to worry about opponents reading them across the table. So it's face-up for me, and everyone ends up doing it too.