Why does AdBlock not block all ads?

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Tags

1. #advertising
2. #because
3. #allows
4. #websites
5. #funding
6. #still
7. #source
8. #setting
9. #block
10. #adblock
11. #unless
12. #understand
13. #primary
14. #purpose
15. #acceptable
16. #whitelisting
17. #accidental
18. #appear
19. #intrusive