Patent ID: 8229790

Claim:
A content item selection method comprising: receiving at an advertisement identification message (AIM) receiver in a content displaying unit (CDU) at least one AIM comprising content item display points associated with a display point category; and storing in an AIM storage unit of the CDU the content item display points comprised in the AIM in accordance with the display point category, thereby accumulating in the CDU in user accounts for a plurality of users content item display points for each of a plurality of display point categories, wherein users comprise mobile device users; wherein the receiving comprises distinguishing between AIMs received from a mobile device which is registered and AIMs received from a mobile device which is not registered, the distinguishing being performed by the CDU, and wherein the content selecting further comprises prioritizing, by the CDU, from which mobile device user accounts to deduct AIMs according to previously loaded AIMs by the mobile device users, and the presence and absence, in the vicinity of the CDU, of registered mobile devices that had sent AIMs to the CDU and non-registered mobile devices that had sent AIMs to the CDU; said content item selection method further comprising: selecting a content item for display based, at least in part, on a comparison between a point total for one of the display point categories and a category associated with the content item, the selecting being performed by an advertisement selector comprised in the CDU; and displaying the selected content item on a display screen of the CDU.