Is it permissible to use points from a bank card issued by an Islamic bank and earned through purchases, to buy from a store affiliated with an airline contracted with the bank?

The points granted to the buyer via credit card fall under commercial incentives, and the basic ruling is that there is no objection to them if two conditions are met in their use: that the fees for their services are according to the actual cost of issuing the card, and that they are not above it for the sake of the (points), so as to avoid falling into gambling; and that the beneficiary's use of the card is for a need, not in anticipation of the prize (points). Therefore, if these two conditions are met, these points are permissible, and it is permissible to purchase with them from the aforementioned store.