They have no selling point really, a girl and her sidekick or something? I know what Nick does but that's what most people think I imagine.
I honestly think Amy would have a bigger shot at getting success if she went solo, since most people already think she's a solo act.
I wouldn't be too surprised if they said that your fave was not a selling point. By the way, they are married so with Nick or Amy it wouldn't be Karmin.