I always wondered that. It should have been a smash. But maybe it just wasn't that good of a song and we're just deluding ourselves. Who knows.
I think it was just part of the whole Gaga backlash this year. It deserved much more. It killed Judas, but at the same time that hurt its own initial impact. It performed very well on radio but deserved more. It needed a better video but didn't get one. It could have been handled much better.
Maybe I just have blind faith 
They might as well not have... 