How do I start a Direct-Buy campaign?

Direct-buy campaigns can be started by app advertisers in any of the following ways:
1. Adding a "New campaign", with a  specific publisher, or app targeting. You can perform search queries, by ‘Publisher Name’, ‘App Name’, ‘Appnext App ID’, or a targeted keyword.
2. Buying directly from the top performing publishers, straight from the "Campaign Performance" Dashboard.
3. Buying directly from Appnext featured partners, via the Appnext Market.