Upon purchase, you'll receive TWITCH account.
Link it to your game account to claim the following items: 

1. Supply Crate x92 
2. Anniversary Supply Crate x5 
3. Partner Supply Crate x12 
4. Bayou Bowl Supply Crate x8 
5. Random Hunter x3 
6. 8250x Event Points 
7. Carnassial Wills 
8. Jackal's Snare 
9. Moondial x2 
10. Sinner's Hope 
11. Umpire's Bane 
12. Swallow's Tail 
13. Molted Curio 
14. Random Legendary Hunter x2 
15. The Marquis x2 
16. Gator Eye x2 
17. Huff's Kit 
18. Scaled Peak 
19. Ten Paces 
20. Seven Sights x2 
21. True North 
22. Round of Applause 
23. Lavish Farewell 
24. Bingham Brash 
25. Alley Cat 
26. Old Tusk 
27. Hera's Gift 
28. Random Charm x5 
29. Random Item x5 
30. Ferro 
31. Intimidate 
32. Tender is the Night 
33. Random Death's Caroler 
34. Random Legendary Skin x2 
35. Random Avatar x2 
36. Random Sleigh Ride

NOTE: 
!!! Claim items promptly post-purchase; they may expire.
!!! Unlink the Twitch account once all items are collected.
!!! Items hidden after 6 months are still claimable.

These items can only be obtained once per account. You will only receive items that you have not received before. To receive items, you must unlink the old twitch from your game account. To 100% get one of the hunters (Lulu/Billy) to your account, you must activate the issued accounts sequentially, without breaking the sequence or ignoring the instructions. I understand the letters are difficult, but if you want to get 5 hunters, you will have to spend a few minutes.
Please receive items on your Hunt: Showdown account immediately after purchase. Pick up times may be limited.