How do I receive my $5 reward? When your friend purchases RXBARs for the first time from your custom referral link, you will receive an email with a $5 off discount code. Related articles I have not received my order or I can't find it. What are the natural flavors in RXBAR products? Do you offer discount codes or coupons? Is there a limit to how many friends I can refer? What is the shelf life of RXBARs?