Different demographics contribute to different phone orders. Most college towns, for instance, have a lower than average phone order rate. Most busy stores can

Different demographics contribute to different phone orders. Most college towns, for instance, have a lower than average phone order rate. Most busy stores can't answer every call during a rush, and so some calls go unanswered. During some very very busy rushes, online ordering is disabled in order to prevent people from placing orders that can't be fulfilled in a reasonable amount of time.