You will receive 20% of the earnings generated by your referrals when they participate in research surveys. Specifically, you will earn 20% from your referrals' activities in surveys, excluding "Traits Surveys." There is no limit to the number of referrals you can make, and you can accumulate a maximum of $25 for each referral over your lifetime. If you are able to refer friends from the USA, you may discover that your earning potential increases significantly.