'Using customer transaction data, which is owned by the bank, brands and advertising agencies can "precisely target customers at scale based on purchase history," for example, by advertising to new, lapsed, or loyal customers differently.'

Enshittification comes to banking and credit cards.

This should be illegal since it is selling what should be private data (how people spend their money) and selling it to third-parties, likely without their consent. (It is probably an 'opt out' item hidden deeply in the legal text of a customer service agreement.)