Airtime employee here:
You aren't wrong about the appstore ranking but it is definitely still a bit early to call the app "dead". The Social Networking category is a crowded one with lots of competition but I think we have some interesting value between our in app features and our video technology. This is the only app I've ever used where I've been able to have multiparty video chat on a sketchy 3g/4g connection and it actually worked well.
Give it a try and see what you think! :)
