Will hardcore Japanese card-battling games take off among Western smartphone owners? DeNA is trumpeting the fact that its Rage of Bahamut has been topping the Top Grossing charts on both iOS and Android in the US as proof that they might. Prompted by TechCrunch to compare Rage of Bahamut to games earning $0.15-$0.25 a day per active user, DeNA/ngmoco’s Neil Young claims it’s doing four or five times that amount. What’s more, the game is currently making around the same daily revenues from iOS players as Android players – bucking some of the recent claims that Android still monetises poorly compared to iOS for social games.