When a confirmed player opts out of a match that has reserves waiting, a spot opens up. How that spot is filled depends on the group's slot offer mode.
In Manual mode, the group owner is responsible for managing reserves. When a spot opens, the owner can manually promote a reserve to fill it. This is the default mode for all groups on the Free plan.
In AutoAssign mode, reserves are automatically promoted in FIFO (first in, first out) order. When a confirmed player drops out:
AutoAssign is available on the Pro plan.
RoundRobin mode works similarly to AutoAssign for reserve promotion, but also adds leader rotation. See Round Robin for details on the leader rotation feature.
RoundRobin is available on the Pro plan.
When a reserve is offered a slot (in AutoAssign or RoundRobin mode), they have a limited time to confirm. If they do not respond within the timeout period, the system automatically moves to the next reserve. This ensures spots are filled promptly and no one is left waiting indefinitely.