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

1. Hunter "The Infected" 
2. Hunter "Kill Buyer" 
3. Hunter "Umpire's Bane" 
4. Legendary random Hunter 

5. x37 Skins: The Fifth Tale, The Marquis, Bloodshot, Malady Poison Bomb, Bow "Sinner's Sinew", Alley Cat, Jackal's Snare, Swallow's Tail, “Seven Sights” Sparks LRR Sniper, “Huff’s Kit” First Aid Kit, “Ten Paces” Scottfield Model 3, Roe Stalker Knife, Storied Past Quad Derringer, Solzer's Silver, Spare Dime, Lavish Farewell Legendary Pax, MH IC1 "Bingham Brash", Springfield 1866 Old Tusk, Ferro Romero 77 Shorty, Railroad Hammer Tender is the Night, Random Sleigh Ride, Random Death's Caroler, x15 Random Weapon Skin 
6. x16 Charms: Hera’‎s Gift, Gator Eye, Moondial, Carnassial Wills, Sinner's Hope, Molted Curio, Scaled Peak, True North, x8 Random Charm 
7. x2 Animations: Round of Applause, Railroad Hammer Intimidate 
8. x2 Random Avatars 
9. x211 Crates: Anniversary Supply(33) / Partner Supply(12) / Supply(144) / Bayou Bowl(8) / Halloween Supply Crate(4) - loot from crates immediately comes to inventory, you dont need to open them. Items you can randomly get from each chest: Rifle, Pistol, Shotgun, Special Weapon, x12 Tools or Consumables, Legendary Hunter Instance, Hunt Dollars. 
10. x8.250 Event Points 
11. x35.000 Hunt Dollars

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.