The answer you seek has already been posted in the Test Realm message boards, young Wizard.
The following message is from J. Todd Coleman, Director of Wizard101 at KingsIsle Entertainment.
"The trading of enchanted cards was never intended; it was an error on our part that players were able to use this system to gain access to spells they were never suppose to receive. Yes, this has been an issue in PvP, but that's really a minor part of the overall problem (as PvP is a relatively minor part of the overall W101 experience.)
Please understand that we went to great lengths to craft and balance the difficulty and "fun factor" of our game. We spent thousands of hours pouring over spreadsheets, implementing, testing, and then repeating that process until we got it right. We planned for players to have "easy" fights and "hard" fights. We planned on solo areas, and areas where we wanted them to ask other players for assistance, fostering social connections. As part of this process -- and to make each class feel special -- we created a handful of custom, unique spell that were restricted to each class. We wanted each player to feel like they could do something that other players could not. Each class was engineered to have areas of strength and weakness, so that the style of game play (and strategy) would different from one player to the next. We wanted to foster a sense of identity, to make the game interesting (and different) based on the path that the player chose to follow, and (of course) to make the game balanced across 300+ hours of gameplay.
After all that effort, we made a mistake, one which allowed player to use 50 gold enchantment cards to circumvent these class restriction. Oops! I wish this mistake had never been made in the first place; had the class restrictions been properly enforced from the beginning, players would have thought "well, that makes sense" and not given it another thought.
The problem is, this may seem like a minor issue, but it is not. This one oversight fundamentally dilutes the unique nature of each class. Replicating these spells creates a huge imbalance in our system, not just in PvP, but in the overall play cycle and in the experience of the game we spent so much time and energy crafting. If everyone can cast everything, what's the point of having classes at all? To borrow a phrase from The Incredibles, "When everyone's Super, then no one is." In my eyes, being able to mass produce a collection of class-restricted, high level spells for a trivial amount of gold falls pretty clearly into the category of stuff we should fix. And so, we are fixing it.
I certainly realize that you may not agree with this decision. Much like a parent sometimes the "right" decision is not necessarily the most popular one. In this case, I recognize that some people will be unhappy with this fix. But as the director of the game, I have to look out for the health of the game as a whole. It's my call to make, and I stand by my decision. You may not agree, but I do hope you will understand."
As for Candyland, it's out there on the Spiral somewhere! Candy World is a land of cookie roads, chocolate rivers and candy cane trees. I'm sure my half sisters continue to stir up trouble for the youths of that world.