Capacity
Every event has a participant capacity based on its plan. When the event reaches that limit, new attendees see an "Event is full" message. Returning on the same device doesn't use up an extra slot.
Geofencing
Organizers can optionally require attendees to be physically near the venue. When enabled, attendees are asked for location permission as they join, and only those within the set radius can connect. Geofencing is available on paid plans.