Actually, they would. Because Mobage does reveal something exactly like that in the GI Joe game. They give you the exact percentage of drawing each and every card from each bridge. It's actually really interesting (and eye-opening) to look at. For their more sought after cards, the chance of drawing them is less than 1%. Sometimes less than 0.1%. Sometimes 0.01%. So you are basically looking at a 1 in 1,000 chance. Or a 1 in 10,000 chance. AKA not gonna happen.