Bank card issuers are not pits. They are part of the banking business and are mainly responsible for providing financial services such as credit cards or debit cards to customers. Their job responsibilities include:

1. Receiving customers: Bank card issuers need to receive customers and understand their needs and requirements.

2. Introduce bank card products: Bank card issuers need to introduce bank card products, including credit cards and debit cards, to help customers choose the appropriate bank card products.

3. Audit customer qualifications: Bank card issuers need to audit customer qualifications, including personal credit records and income certificates.

4. Handling bank card business: Bank card issuers need to handle bank card business for customers, including filling out application forms, checking information and handling formalities.

5. Answering customers' questions: Bank card issuers need to answer customers' questions and queries when handling bank card business. In short, bank card issuers are members of the banking business, and their job is to provide professional financial services to customers, not to cheat customers. However, when customers choose bank card products, they need to carefully understand the information such as the cost, interest rate and quota of bank cards to avoid being deceived by unscrupulous merchants.