Apparently you can now get free membership through the CP game!
There's an easy and simple way to do it! This cheat was discovered in May and it works!
-First create a new penguin.
-Color your penguin aqua.
-Play every mini-game at least once.
-Get the red puffle.
-Go to the Dojo and walk around. Your red puffle will dig up the secret staircase!
-Sensei will congratulate you and guide you through the ninja caves.
-There, you must join the EPF and the ninjas in order to defeat Herbert and Tusk in an epic battle of Card Jitsu Shadow!
-If you win, you will be rewarded with a 5-year membership!
-Don't worry if you lose! You can try again!
Go ahead and try it! Enjoy you membership!