Stack The Deck

Here’s my deal: this isn’t a webinar, but I have prepared a deck for you. Read all the letters on the cards to solve, but not in the order they are presented: that would be too easy. I suggest you split the work up, but suit yourself. The message is spelled out based on the cards’ value. When you find and read my question to you, you’ll see the single-letter solution you’re looking for was staring you in the face all along.