You have the option to offer Discount Codes (aka Coupons) for both memberships and media folders.
Just click the "Settings" gear, and click the tab in the top right that says "Promotion". Then click the "+" black circle in the bottom right and select "Coupon" under the section "Promo Type". You can customize the Coupon to apply to either a subscription, ALL media folders, or just one specific media folder.
***remember, if you offer a Discount Code for a membership/subscription, that fan is locked into that discounted price for life.
1. Click the "Settings" gear
2. Click "Promotion" in the top right
3. Click the "+"
4. Click "Coupon" under the Promo Type
5. Customize however you want by choosing if it's for a subscription, one media folder, or all media folders. Leave the date range and availability blank if you want them to be unlimited.