With a white label casino, I think you need to go beyond the templates you’re given and try to create your own brand. In the case of EarnUnited, they have a strong suite of games and some useful features that you can promote but (apart from my own site) pretty much all the white label sites I’ve seen look the same.
The same is true of Grand Virtual and GamblingFederation. You’re not gonna do much business simply by using the rather drab templates you’re given.