I'm going to list all the free rewards that PWI gives recently, instead of searching around it in the forum. It's mostly for convenience.
*Note: all of these codes required Arc to be installed. They can only be redeemable through Arc.
*Unless otherwise stated, all codes are active.
*Jones' Blessing: KxK58gAf
*O' Malley's Blessing: iItxAUKD
*Free survival apoths (charger orb, sutra, vacuity, IG, and dew): Ehcr5GT5 (once per account)
*VIP Platinum Crown (Hair fash + untradeable, but stashable Plat Guardian Charm): McytfINY
*Dreamchaser Pack: gVqIRES4
*50 event golds: SFGKJKgc