Pre-requisite: supported for events and competitions
Aim: give the possibility to customers to register online their interest for a sold out event.
Description: for any sold out category, if the functionality is activated, customers can register on the waiting list for the sold out performance or match. If the product becomes available again, nothing is automatically triggerred, but you can send bulk emails to inform customers on a waiting list of a specific product.
The description of this functionality is detailed in the release notes here.