https://www.gamespot.com/articles/pubg-free-crate-available-for-amazon-twitch-prime-/1100-6461239/

There are a lot of benefits to being an Amazon Prime member, especially for PC gamers. Anyone with an Amazon Prime membership automatically gets a Twitch Prime membership. Simply by linking your accounts, you can get lots of free stuff. The latest freebie is a Jungle Crate in PlayerUnknown's Battlegrounds. Prime members can grab their free crate between now and September 17.

Available only in the PC version of PUBG, the Jungle Crate contains six jungle outfit items and two weapon skins. The outfits, detailed below, look like typical safari gear, albeit with purple being a prominent color. The weapon skins are Croc Bite for the M16A4 and Bengal Blade for the SCAR-L. Here's the full list of what's included in the Jungle Crate.