Bank benefits and Credit card reward programmes

eBucks

Q: Kindly please advise.

My husband has a credit card which he uses to do transactions and alhamdulillah all these transactions are interest free. He uses it for convenience so he doesn't need to carry cash. By using this card he earns ebucks points which have accumulated and will be very valuable in purchasing necessary appliances in the home. Is the purchasing of these items with the ebucks points permissible?