Sprint Offers it’s Own New Prepaid Service

In an attempt to cannibalize itself, Sprint has decided to launch it's own prepaid service.  Since Sprint already offers it's own prepaid services under the brand names Virgin Mobile and Boost Mobile this move seems a bit puzzling.  I would hope that under the actual prepaid name Sprint, roaming would be offered, otherwise there doesn't seem like much reason for this service option to exist.  Plans start at $45 for unlimited talk and text, but wifi only for data.