A system includes at least one server that is configured to provide a multi-client network service to a plurality of existing users. When the server receives requests to join the multi-client network service from new users, the server may issue timestamps to each new user and obtain load metric based on the requests or timestamps. The server can repeatedly compare the load metric to a threshold load value. When it is determined that the load metric does not meet or is below the threshold load value, the server enables joining the multi-client network service by the plurality of new users. Otherwise, when it is determined that the load metric meets or is above the threshold load value, the server causes delivery of a wait message to the new users and keeps them in a wait mode for a predetermined period or until the load metric changes.