How does PayPal work without a balance?

Related questions

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Tags

1. #paypal
2. #follows
3. #instead
4. #remainder
5. #whole
6. #account
7. #debit
8. #payment
9. #transaction
10. #credit
11. #balance
12. #taken
13. #method
14. #cover
15. #charged
16. #confirmed
17. #enough
18. #hierarchy