I like that it's easy to find publishers, as well as targeting my ads towards people who are interested in what i'm selling/promoting! It also has an API so you can connect with other platforms or even build your own apps using their SDKs - which would be amazing if they had more info about how those work (just google them up).
If someone doesn't market properly there isn't much of interest at all; no one knows me yet, but when aircast does get used by enough users then maybe we will have some