Consumers at 1,562 Target stores can exchange private label prepaid cards from more than 200 retailers for a prepaid Target card — at a discount. This takes place at the Target Mobile counter, which is run by Market Source, in the electronics department at Target stores. Blackhawk Network’s Cardpool unit provides the value exchange rates on the prepaid cards. Market Source is Target’s vendor partner handling the sale of mobile phones and mobile payment plans. Blackhawk Network purchased Cardpool in 2011. It competes with other online exchanges consumers can use to swap prepaid value o...