Any Firecracker subscriber, that is anyone with with a paid Firecracker account, is eligible to participate in our referrals program. We can make some exceptions for users who are under long term unpaid accounts and who are members via school accounts - just write to us at firstname.lastname@example.org and we’ll help you get set up. You will earn 25% of the subscription value for every new student you refer (for example, if the new member you referred purchases a longer-term plan for $400, then you'll earn $100).
We do not support self-referrals. Existing Firecracker users cannot be referred. Full referral FAQs are detailed here: http://learning.firecracker.me/firecracker-referral-program-faq