Free trial user's only (Redeem Before paying for your 1st
subscription)
Login to your final fantasy xiv account.
Click on your account at the top left of the screen
Click on (manage service options)
Click on (enter recruitment code)

I have Multiple unused codes:

Enter the code: MUE8C6WC

When you purchase a subscription for the first time you
will get
Friendship circlet: EXP Boost by 20% under level 25 for
all classes.
99 Aetheryte Tickets: Every ticket used will insure no gil
cost when teleporting.
Ballroom Etiquette: Fist bump emote
-10 silver chocobo feathers: trade to calamity salvager
for special item and powerful gear.
Rewards increase the longer you are subscribed.