One day people will learn that Wikipedia is not a reliable source for accurate information. Also that link refers to one of uCool's other games, Evony. So I'm not sure what relevance it has here.

That said, you can play the game or don't. Every time you shuffle the cards in the Tavern, Labyrinth or wherever, the game will pick the card it'll award you as soon as you click. There is no hidden pitfalls, it is what it is.