PrizeRebel is one of the bigger incentive marketing companies out there with over 5 million members. They offers other paid activities in addition to surveys, including paid videos, paid signups and other paid offers/tasks. Member payments are made via gift cards, PayPal or direct deposit with a low $5 minimum.
Referral Program: 20% for the lifetime of your referrals.
Index: SurveySavvy | ClixSense | InstaGC | SwagBucks | PrizeRebel | YouGov | PaidViewpoint | BrandedSurveys | MyPoints | Springboard America