I remember thinking she'd do less than half of that because Fancy wasn't even a proper hit back then. Had Azealia done 20k+, I would have gone with her.
AB.
She dropped it near the end of the week, after years of struggling to get it out.
Iggy's had much more notice, including, as someone else mentioned, a pre-order.
I'm not sure how much better AB would have done with a pre-order, mind you, but after years of talking about it, she basically HAD to drop it without warning, or risk having her album drop being overshadowed by more stalling.
As well, and only a little relevant to this, I much prefer BWET to TNC.