You need to verify email, then validate address, then add a credit card (no paypal), and then press a button labeled "Enjoy my free month".
Except when you add a credit card, they try to bill you for 20EUR right away.
Except when you add a credit card, they try to bill you for 20EUR right away.
This is a fairly common practice to weed out stolen credit-cards and to make sure you are real subscriber/customer, no biggie.
I would recommend changing that behaviour ASAP ;)