When a user subscribes to Riverside using your affiliate link, Rewardful tracks that referral and adds 20% of their subscription to your pending commission total. After the commission total reaches a $200 threshold, Rewardful sends the money to your Paypal account. (Log in to Rewardful to change the Paypal account.)
NOTES:
The user you refer to Riverside must sign up within 60 days, before the affiliate link's tracking cookie expires.
As long as a user remains subscribed to Riverside, you can continue to earn a commission for the referral. There is no cap on total payouts.