Since May 2019 we have switched to VISA. In February 2020 we sent a new Visa card to all customers with a Mastercard. This was an important step to be able to implement Applepay (which is one of the most sought after features) in the coming months. In April 2020 all Mastercards will be deactivated. As soon as you receive your new Visacard, you can activate it in the app.
With the change to Visa we only change the card provider. If you have any questions about the Impact and specifically the climate protection contribution, have a look at the FAQ's on the topic "About us".