Is World of Warcraft a one time purchase?

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Tags

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2. #expansions
3. #including
4. #seven
5. #upcoming
6. #azeroth
7. #character
8. #collection
9. #purchase
10. #subscribers
11. #updating
12. #world
13. #which
14. #today
15. #digital
16. #includes
17. #boost
18. #warcraft
19. #level
20. #complete