Dutch retailer Spar has unveiled a new marketing campaign designed to promote its own brand range, by offering consumers the chance to ‘swap’ branded products they have already bought for Spar private label products. The week-long initiative, which will take place in early September under the name “Inruilweek” (“Exchange Week”), will allow Spar customers to bring selected categories of FMCG product into store and exchange it for an equivalent product …