Refer-A-Friend. Get $10! Refer PurpleTrail to a friend and they will receive $10 off their first PurpleTrail order of $50+. For every such friend who orders on PurpleTrail, we will also deposit $10 (worth of PurpleCoins) in your PurpleTrail account. Everyone wins!! To learn more about the Refer-A-Friend program, click here.