Answer:
(Fatwa: 988/L=394/TL=1432)
If a bank receives some amount as fee for providing the facilities, then it is not interest. As far as the matter of using different cards is concerned, if the bank does not receive extra amount in case of making a purchase through these cards then its use is alright.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
