If you want to offer your customers an incentive to purchase a membership, you can offer a membership promotion. To get started, go to Settings > Manage Membership Promo Codes.
Click "Add New Promo Code" and configure a new code:
Discount Amount - can be either a percentage or a fixed amount of money to be discounted off the monthly subscription price.
Applies forever? - decide if this promotion discounts the price for all future billing periods, or just the first X billing periods.
When the customer is purchasing a subscription to your membership plan, they will have the option of entering this promo code: