NO SHADE, but... the problem is that no one wants ARTPOP.
They can discount it all they want. People still aren't using it.
I understand your point, but if the discounts weren't doing anything, then why did the album go from outside the top 100 (200?) WW to back in the top 10? Plus, it was out of the top 200 in the US and is now top 50. It's proof that with some promo + a light discount, Gaga can sell well.