Yes, every photographer that creates an Instaproofs account and lists you as their referrer earns you an additional 3GB of storage space on your account, and the person you refer gets an additional 2GB of storage space on their account as well.
How to Get Credit: Simply tell everyone that you refer to Instaproofs to enter your name or email address in the 'referred by' input box when they create their accounts. Alternatively, you can also refer someone by simply sending them your custom referral link.
Your referral link can be found in either the Company Info page or the Referrals page within your account.
View Your Referral History: You can view your referral history by clicking on your name or logo in the upper left side of the main menu, and then clicking Referrals.