This means the network is under or not obvious concerning the stock being purchased or the sites the advertiser may be operating on. It’s a lot like running a blind campaign. These networks will run an advertiser’s crusade on stock it really is both pre purchased and a mixture of demographically focused sites they’ll bid on from the ad trade. Performance will vary depending on the first-class of websites they’ve pre bought stock from and the ad exchanges it accesses, as well as the info available to the community via a DMP. While these are low-cost than Vertical Networks, the risk is lower satisfactory campaigns.