About: http://webisa.webdatacommons.org/230611942

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Those items you mentioned are loss leaders", i.e. goods sold at little-or-no profit to bring in customers who (hopefully) will also purchase more-profitable items or services.
http://www.w3.org/ns/prov#wasQuotedFrom	washingtonpost.com