Database purchase: Third-party companies may purchase or lease customer data sets, such as mailing lists and telephone numbers, and then use this information to contact potential customers and provide credit card services.
Recommendation of existing customers: A third-party company may obtain new potential customers through the recommendation of existing customers, who may be loyal users of the company or customers who have obtained credit cards from other companies.
Information leakage: In some cases, customers' personal information may be leaked, such as data leakage of credit card companies, banks or other third parties, hacker attacks, etc.
It should be noted that some third-party companies may use illegal means to obtain customer lists, such as stealing, forging, collecting or selling personal information and other illegal acts. When consumers choose credit card services, they should choose trustworthy companies and pay attention to protecting their personal information from abuse.