Amusement and premiums network

A system for controlling a medium of exchange comprising: plural terminals at various locations for detecting the presence of a person and of an activity carried out by the person, and for providing signals indicative of the identity of the person and of the activity, a first database for storing predetermined exchange values for the activity, a second database for storing separate medium of exchange accounts for various persons including at least one of customers and merchants, apparatus for detecting the signals, for accessing the first database and for crediting an exchange value related to the activity to an account of a person carrying out the activity or on whose behalf the activity was carried out, in the second database, and an administration terminal in communication with the first database for generating and downloading to the first database parameters indicative of the predetermined exchange values for various activities, from time to time.