How does refer a friend work?

The program is only available for paid users (referrers) to invite other free users (referees) to subscribe to EnglishCentral;

• If the referee purchases a 3-month subscription which is the same or higher than the referrer's subscription, the referrer earns an extended subscription for 2 weeks. 
• If the referee purchases a yearly subscription which is the same or higher than the referrer's subscription, the referrer’s subscription is extended for 8 weeks.
• If the referee purchases a 3-month subscription lower than the referrer's subscription, the referrer’s subscription is extended for 1 week. 
• If the referee purchases a yearly subscription lower than the referrer's subscription, the referrer’s subscription is extended for 4 weeks.

Note: Subscribing to any video learning subscription doesn't reward the referrer any extensions.