Why can't we see what cards NPCs may possibly give us when we win TT? Instead we get a question mark with a tooltip that says something like "Other rewards may be available."
There's no reason to hide the cards NPCs can give you. What's the rationale? "We don't want the player to know if playing against this NPC is pointless or not!"? If that's the rationale, it's working, because I don't care enough to look it up.
Please, replace those question marks with a sprite of a TT card that reveals the card's name if we place the cursor on it. And maybe even be real with us: tell us the drop rate. Please?