Nicki's fans are going to side with her no matter how corny the response may be.
Just because Rem doesn't sell like Nicki, doesn't mean she didn't slaughter that diss record. This is hip hop, not pop. It ain't about who has sold more, it's about who came harder on wax. Nicki has her work cut out for her. That's not to say that this jeapordizing her career in anyway. As long as she makes music her fans love, she'll be fine. But this beef ain't about that.
And Nicki came in the game disrespecting the females that paved the way for her to even be doing this. She been winning because she hasn't had any commercial competition.