The usual misleading Ryanair fanfare.
The German court held that:
Ryanair can charge a credit card fee as long as it offers a widely used method of free payment. Which VISA Electron is not in Germany. So in Germany Ryanair's free method of payment is in breach of the legal requirement and the relevant part of their T&C void under German law.
Note that Ryanair now has Mastercard Prepaid as their free method of payment. MAkes no difference in Germany as neither nor is "widely used" as required by the German court.