Comment by Intermernet

The extra charges you are describing are a "cherry on the top" for the card issuers. They could easily survive without those charges (in many countries they do). They also act as a convenient diversion. If you think that's the way they make money you will avoid looking into the other ways they make money. Namely, exhorbitant interest rates on defaulted loans by those who were "sold" credit cards with no practical means of ever servicing the debt.