The above three give you cash, but many merchants give you store credit. Examples of those would be Stitch Fix, thredUP, Zulily, The Honest Company and more. Whether those would be worth it to you will be dependent on how much you shop there. Stitch Fix will give you up to $600 a year in referral credit. That's $600 worth of clothes that I don't have to pay for. That's worth it to me. Once I hit that $600 mark, I switch out the link for their Commission Junction affiliate link so I am still earning on any signups after I hit their referral threshold.
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