When a mover during moving is displaced in a direction perpendicular to a moving direction, between a deformation pattern portion formed in stator-side electrodes of a stator and a deformation pattern portion formed in mover-side electrodes of the mover, a restoring force trying to return the mover toward a direction opposite to the X2 direction acts on the mover. A drive train is operatively connected to the power source. A qualified subscriber is identified for the advertiser based on a profile of a subscriber.