Adsel was forcast to generate revenues of US $100K p/d, it would appear there's issues with the tech.
https://www.unrealengine.com/marketplace/en-US/product/adcel/reviews
https://apps.apple.com/us/developer/iconicreach-by-engage-bdr/id1469108247
Nearly 3 years on and not much in the way of updates for iconicreach.
Doesn't appear to be available on Google Play and not widely used as projected.