I don't see on their site where they offer banner ads
Realizing that video is fundamentally different from banners and text, YuMe launched an advertising technology solution in 2007 that could properly monetize, distribute, traffic, and report against video.
Doesn't mean they absolutely don't have both video and banner, but it might be a good indication.
I have reasoned that most banner ad networks operate with a web location destination, which I don't think is suitable for Roku channel/content developers. I have asked here about banner ad network for Roku but have not seen any responses. My channel will be ready within the next month or so, and I'd love to support it through banner ad revenue. I just have not seen any suitable banner ad network yet.
Perhaps I need to modify my app to show 10-15 second video ads.
Someone needs to start an "interactive TV banner ad" network for app and content developers.