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Sorry to tell you but that's not true. Literally the top Google result says the contrary:

> "Out of the various fees, interest charges are the primary source of revenue." [1]

Yes, credit cards charge a large transaction fee, but wind up refunding a large portion of that back to the consumer in the form of rewards, so these days that's not the main source of profit.

[1] https://www.valuepenguin.com/how-do-credit-card-companies-ma....






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