Code:
44PP6KST
D3G74JGJ
DJSVK8R9
NP6ZZS26

You can register the code by
1. Creating a Square Enix account
2. Logging into Final Fantasy: Mog Station
3. Your Account > Registration Codes > Enter Recruitment Code
4. Enter the Recruitment Code - before you purchase your first 30 days

Bonus items are:
1. Friendship Circlet Increases EXP earned by 20% when level 25 and below.
2. Aetheryte Ticket x 99 Players in possession of an aetheryte ticket when using Teleport will not incur a gil fee.
3. Ballroom Etiquette - Improper Greetings: Using this will unlock a new emote. Fist Bump (/fistbump, /brofist)
4. 10 Silver Chocobo Feathers Trade to the Calamity Salvager NPC for special items.