The IGA brand is used by retailers belonging to the Tasmanian Independent Retailers cooperative. Dixons Retail plc was one of the largest consumer electronics retailers in Europe. Sales promotions targeted at retailers and wholesale are called trade sales promotions. The publication is available to both comic shop retailers and consumers. Consequently, consumers in these areas are vulnerable to prices set by fewer retailers. Consumers might search for information about other retailers and substitute products consistent with their beliefs. Participants of the Challenge are manufacturers of electronics and electronic retailers. They are able to research products and compare prices among retailers. It offers products through retailers and online. Merchandise is also available from other retailers. A use tax applies to purchases made from out-of-state online retailers and catalogs. Benefits also include further discounts with other retailers. They enlisted support from musicians, politicians, journalists, media companies and retailers. It sparked controversy among some online publishers and retailers. The company is also one of the largest Canadian retailers of petroleum products.