Recruit a Friend
The code must be entered after buying the game BUT BEFORE paying for a subscription.

How to redeem:

Log into the Mog Station https://www.mogstation.com/

Under "Registration Codes" select "Enter Recruitment Code".

Enter the code: 6HK8ZC4F

Rewards obtained after buying a subscription:
Friendship Circlet: +25% exp on all jobs at or below level 25
Fist Bump emote: only obtainable from RAF
99 Aetheryte Ticket: lets you teleport for free
10 Silver Chocobo Feathers: used to buy special items: Trade these to a calamity salvager at any of the 3 major cities for goodies. Very handy for getting higher level gear than you would otherwise be able to access.