If Gaga EVER discounted/remixed her singles I would lose SO much respect for her. It is not about number ones, if it doesn't do well on it's own, leave it alone.
But I would hope that Gaga would have too much grace + dignity to do something like that.
amazon made the choice to discount it, and furthermore it would have had strong first week sales and would have debuted at no.1 regardless, so it doesn't reek of desperation like she would if she remixed/lowered prices of an under performing single.