How do credit cards earn money?

Related questions

1. Is it bad to have a lot of credit cards?
2. How do credit card make money if you pay full?
3. Does Mcdonalds do cash back?
4. Do you get charged for cashback on a credit card?
5. Is Mastercard Black card worth it?
6. Do rich people use credit cards?
7. Can you withdraw money from a Mastercard credit card?
8. Why do credit cards offer cash back?
9. Do you have to pay back cash back rewards?
10. Does Cancelling a credit card hurt credit score?

Tags

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2. #percent
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4. #ranges
5. #annual
6. #advance
7. #interest
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9. #price
10. #companies
11. #purchase
12. #revolving
13. #credit
14. #which
15. #merchants
16. #include
17. #money
18. #purchases
19. #carry