Is there a certain amount I need to spend in order to redeem my $20 refer a friend coupon? July 14, 2020 23:48 Updated Yep, the $20 coupon is only good on orders of $100 or more! Related articles How does the referral program work? When do I receive my $15 birthday coupon? Is there a limit to how many friends I can refer? Do you have teacher or first responder discounts? Do the $20 refer a friend coupons expire?