"Recruit a friend promotion" ineligible

Are all players eligible to use the "Recruit A Friend" service?

Players with a World of Warcraft account from the following countries are able to use the "Recruit A Friend" service: Austria, Finland, France, Germany, Italy, the Netherlands, UK, Norway, Sweden, Greece, Ireland, Belgium and Spain. Players from outside of these countries; players with trial accounts, or with full accounts with five referrals from the "Recruit A Friend" service currently pending, are ineligible.



So my question is why can only these countries recruit friends, and I can't? Could anyone tell me?