MTV Networks is expanding its vertical ad network strategy with Tribes, demo-focused vertical ad networks built around core online properties. Pepsi is its charter advertiser for "MTV Generation
Tribe"; Tribes will include a network of publishers focused on music, movies, teen sports, gaming and style. Among its launch publishers is echo, a Ticketmaster company which hosts the Web sites of
Alicia Keys, Kanye West and KoRn. Tribes from CMT, Spike and VH1 are also set to begin this month, with a Comedy Central Tribe launching in the first quarter of 2009.
