A network computer server system for controlling a plurality of network access lines to provide subscriber access to a computer network comprising an access line interface for partitioning the plurality of network access lines as first and second stage lines, including a processor encoded with instructions. The instructions include determining an available number of second stage lines; queuing arriving subscribers bidding for network access in the first stage lines; determining a spot price of the resource based on at least one arrival subscriber not admitted to the second stage lines; determining a reservation fee for secured access to the network; determining whether a subscriber has accepted or rejected the reservation fee; controlling the access line interface to disconnect from the network non-reserved subscribers whose bid prices are below the spot price; and activating a reservation of reserved subscribers whose bid price is below the spot price.