We don't have any advertisers using our custom tech currently, so sadly no real screenshots ;( We're backfilling fullscreen images to get started, and optionally overlaying text in seperate layers with a parallax effect, along with our loadscreen elements.
The ads are coded in JS, and take advantage of JS middleware we've created which interacts with the native engine. Currently we support only 2D, but you can essentially make and animate anything you want. Physics can be enabled/disabled at specific times, etc.
It looks very, very cool when fully taken advantage of. If anyone is interested in designing a real-looking ad (not just a tech demo), feel free to contact us :D