1 is interest income. Although credit cards now have an interest-free period, in case you forget to pay back the money after the interest-free period, the interest is quite high.

2. You use a credit card to swipe your card outside. If you don't swipe it once, the merchant has to pay a 2% handling fee to the bank. Although there is no loss to you, if the bank does not issue an additional credit card, the possibility of the profit of the pose machine will increase.

3. When you apply for a credit card, you should provide the information to the bank. Basically, the bank can keep your information confidential, but these information can be used by the bank itself. I will send you some advertisements every month or something. Information is business opportunity.

4. Report the loss of the card, and the annual card fee, all of which can be received.