Why do credit cards offer cash back?

Related questions

1. Is Mastercard Black card worth it?
2. What is the highest paying cash back credit card?
3. Do you have to pay back cash back rewards?
4. How do credit cards earn money?
5. Are points or cash back better for credit cards?
6. Do rich people use credit cards?
7. Are Cash Back Credit Cards Worth It?
8. What is the point of cashback?
9. Is it bad to have too many credit cards?
10. Do you get charged for cashback on a credit card?

Tags

1. #merchants
2. #companies
3. #transaction
4. #credit
5. #balances
6. #percentage
7. #charging
8. #money
9. #amount
10. #additionally
11. #rates
12. #payment
13. #required
14. #accept
15. #company
16. #interest
17. #issuing
18. #month
19. #carry