Azealia Banks had ACTUAL management issues and label problems which caused her album to decrease in sales. She's a virtually unknown act to the GP who just dropped her album with no notice on iTunes and it still sold over 10k, lbr, that's good for her.
Azealia isn't surprising. It isn't like she's coming off a hit single and she missed the peak of her hype. Don't see this as a bad thing considering the circumstances