Ubivis: You should mention, that it is just for new accounts. If you already have an accout, there is nothing for free :)
I tried it, and contacted customer support with my basic german school level understanding and google translate. They told me that i didn't register in the right way. I messed up somehow. You have to do it in a certain way which i can't remember.
Registering the game before you sign up or something strange like that.
They allowed me to create a fresh account, but i'm hesitant to try it again.