Chinese e-commerce giant Alibaba saw its user base continue to grow in the fourth quarter. On the bottom line, Alibaba earned 81 cents a share - that was six cents ahead of estimates. On the top line, sales came in at roughly $4.2 billion, or up 40%, but fell short of analysts' estimates. The sum of Alibaba's online transaction, also known as 'gross merchandise value,' or 'GMV,' was $127 billion, that's up 49%. Mobile GMV was almost half of total GMV. Alibaba is facing a critical report from Chinese regulators that it is failing to do enough to prevent counterfeit goods from being sold on its websites. For its part, Alibaba says the report is unfair and is preparing a formal complaint.