A Velvet Rope for Mobile Media Buyers and Sellers, Run by Medialets

Publishers who worry that digital ad tech is hammering their premium pricing are increasingly turning to private exchanges, where they hope a velvet-rope approach will keep keep bargain buyers out. Here’s a similar approach from mobile ad start-up Medialets, which has created an exchange featuring ad inventory from “more than 40 of the world’s top publishers,” who Medialets won’t identify. The exchange is nonexclusive, so buyers and sellers can still work with offerings from Google, Apple and smaller players like Millennial Media, which is looking to go public.