The Google Apps Referral Program is currently a available in India. However Google had launched the initiative in the US and Canada last year. The referral program allowed a $15(₹975) bonus for each new user that signs up. To sign up for Google Apps Referral Program you need to enter your name and email address, and a bank account to receive direct deposits.
For referral, you receive a unique referral link after registering for the program. Start with email and website templates that Google provides. You get rewarded when customers sign up using your unique referral link. The fine print reads: You can refer an unlimited number of customers. You’re rewarded for each referral customer’s first 100 users. A user is an individual account belonging to the customer domain. Your referral amount will be based on the number of users who have paid for at least 120 days.
You can Sign-up for Google App Referral here -
https://www.google.com/intl/en_us/work/apps/business/landing/partners/referral/