The ebates (Now Rakuten) Refer-A-Friend program will help you earn rewards and bonuses every time the referred person makes a purchase.
Earn $25 when you refer someone to Rakuten (formally ebates) with your link and they sign up within the offer period (see ebates terms).
Notably, there are times when the company will have gift hampers for every person you refer.
Considering that you automatically get a unique link upon signing up on Rakuten, the Refer-A-Friend program is the easiest way to gain more from the site.
You just need to forward the link to your friends and encourage them to follow it when creating their accounts. By referring to multiple people, you will unlock numerous gifts and rewards in addition to your cashback.