I never think about that because I don't even think Ayu should do anything to have better sales. I mean, she's a great artist but her peak is over. Older artists usually need to give newer ones the opportunity to shine and have their time, that's just the nature of pop music. Namie Amuro is definitely an exception.
I'm glad Ayu is happy and releasing the music she wants to. Plus, she has been achieving moderate success lately and that's enough, isn't it?