I have a web app right now that has iAds enabled on it. However, I would like to open up my options with advertisement by allowing people to pay for their own custom advertisement for a banner ad. After doing some research, iAds does not have an option to allow you to throw your own custom advertisements into the bannerView rotation. As such, I am looking for alternatives. I am looking for an advertisement company who offers mobile SDK's (or some method not necessarily involving a company) to allow me to put my own custom advertisement into the rotation, as well as keeping outside advertisement in the mix. Any help is much appreciated.
Google adMob's house ad campaign is the answer.
"House ad campaigns are campaigns that serve ads to your app using your own inventory, free of charge. You can set up house ad campaigns to promote either your own apps or another advertiser's product through a direct deal. When you create a house ad campaign, you determine whether the campaign has an impression goal (i.e., impression goal campaign) or is eCPM-based.
During AdMob Mediation, impression goal campaigns are served first. If there are multiple impression goal campaigns, ad serving will rotate evenly through the campaigns. After all impression goal campaigns are served, ad requests will be filled by eCPM-based ad sources, including the AdMob Network, AdMob eCPM Floor Beta, and third-party ad networks. The eCPM value determines the order of the ad network to serve ads.
The house ad campaign creation process follows many of the same steps as regular paid campaign. If you've ever set up an ad campaign, setting up a house ad campaign will be very familiar."