What is the catch with Publishers Clearing House?

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Tags

1. #value
2. #products
3. #chance
4. #based
5. #consumer
6. #magazines
7. #founded
8. #attention
9. #multi
10. #entry
11. #house
12. #prizes
13. #publishers
14. #calls
15. #channel
16. #direct
17. #clearing
18. #marketer
19. #company
20. #consumers
21. #providing
22. #sweepstakes