Can I use a Promo Code on a Membership?
Edited
While Promo Codes cannot be used on a Membership directly, you can sell memberships and offer Promo Codes as an additional incentive once a member has signed up.
For example, you have Membership X. Once a new customer signs up for Membership X, send them Promo Y. They can then use Promo Y to receive a 10% discount on all reservations for their first month. This is very valuable for you to A/B test which promo codes are most helpful in capturing new members.
As an alternative to Promo Codes, you can provide new members Credits once they have signed up for an account.
To learn more, read about Credits here.
Promo Code
Membership
Credits