Thought I might give this a try...
Friend Codes!
CGZ4BVCU
6ND77HV2
RYYHJ7QT
9ZSEH9TB
WEJN9QKP

Directions!
  1. Go to http://sqex.to/Msp, register an account, login.
  2. DO NOT purchase a subscription yet!
  3. Find and click "Manage Service Options"
  4. Then click on "Enter Recruitment Code".
  5. Enter any of the above codes (if one is used try another).
  6. NOW purchase a subscription.

Rewards!
Friendship Circlet 20% more exp at lv.25 and under, including when sync'd!
Aetheryte Ticket (99) That's 99 free teleports!
Ballroom Etiquette - Improper Greetings The book for the Fist Bump (/fistbump /brofist) emote!
Silver Chocobo Feather (10) The Calamity Salvager exchanges them for weapons or equipment!
Remember: you need a 30 day subscription. Free days do not count for this.
Check the website for the Recruit a Friend Campaign for full details!