Referrers get a +10% Earning Bonus for all tasks they Referrals complete. For example, if your friend completes a task and earns 10 JMPT, you will get 1 JMPT as an additional reward (your friend keeps their 10 JMPT earned, and you get 1 JMPT as a bonus).
Referrals get a +20% Earning Bonus on their first task. For example, if your friend completes a task and earns 10 JMPT, they will get 12 JMPT in total (10 JMPT earnings + 2 JMPT bonus).