I've cracked the code. Spoilers ahead! I've changed all the text to white so it won't show up. Highlight the text below if you want the code spoiled.
I broke it by assigning a letter to each symbol and then considering it as a cryptogram. Here's the coded text on each card. Note: some cards contain coded swear words which I'm not going to translate here. I'm no prude, but I should practice what I preach and in the past I've altered people's posts for using these words...so...
Coded swears will be represented by *'s
5: puzzle one-two five seven
12: i want to motorboat those "melons"
17: puzzle seven-two one five
23: that's right, ************. i quoted a ****** coffee commercial and there's nothing you can do about it **********. ****, ****, ****. sweet, that's all seven words. writing in code is cool.
28: puzzle four-three two one
33: take off every zig
90: puzzle three-to find the code, take the number of cards in first edition, add the swords of great justice, then add the letter B in elvish.
92: like your grandpa on his blue pill
99: this house is a ******* prison on planet ******** in the galaxy of this sucks camel *****
104: "P" to the "E" to the "M". recognize!
Those are all the cards I have with codes on them. This should give you enough info to solve any cards I'm missing, as well as all the swear words i omitted.
Interesting...the codes hide a puzzle. Now I'll have to get to work on that.
"If you always do what you've always done, you'll always get what you've always got."