Is buying coupon inserts illegal?

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Tags

1. #every
2. #service
3. #nontransferability
4. #printed
5. #charges
6. #coupon
7. #clause
8. #illegal
9. #legitimate
10. #which
11. #however
12. #coupons
13. #violation
14. #purchase
15. #clipping
16. #selling