So funkioniert's:

To thank you for your loyalty, we give you Magic Crystals with every purchase. Magic Crystals are bonus points for which you can buy products. For 1 Euro value of goods you get 5 Magic Crystals. You can pay your order completely with collected Crystals. 100 Crystals are equivalent to 1 Euro discount. You will receive your Magic Crystals after 4 weeks. You can check the status of your Magic Crystals in your user account.