The only limitation of a reserved server is that players cannot join it automatically. It is a server that’s detached from automatic matchmaking and can only be accessed through a server-sided method with an access code generated by ReserveServer. It’s also a single instance so if it’s at maximum capacity then no new players can join the server. All configurations of a reserved server are inherited by experience- or place-level settings.
Any other limitations can be imposed by the developer according to their systems.