As long as your MuchBetter balance is enough to cover the cashback, it will work like with any other card.
[cashback is available only in some countries and it means paying extra in a shop, and getting some cash back - like going to an ATM.
Note: The use of MuchBetter cards and wearables is temporarily out of service. Unfortunately, MuchBetter cards or wearables cannot be activated in the app for now, nor used for purchases or ATMs. However, you can keep it with you safely and we will confirm when you are able to proceed with activation or its use.