Want to earn a free monthly product from doTERRA? Each product has been assigned a value of Personal Volume (PV). When you purchase doTERRA products, your PV increases. When your PV reaches 125 on your Loyalty Rewards order, the product of the month will be automatically added onto your LRP order. The product of the month can be earned only once a month on the Loyalty Rewards Program by placing an order of 125 PV or more between the first and fifteenth of the month.