The awards aren't awarded on who sells the most though. It isn't a meritocracy. But I don't think Nightwing's sales have anything to do with it being set in Bludhaven. I think the book would have sold the same set anywhere given the creative team and DC pushing the book at the time. Outside the Ric arc Nightwing's book has been one of the most consistent selling books since the New 52 I feel like.