Aliexpress is a division of Alibaba Group, which likely makes the bulk of their profits through their B2B sales. They don't provide separate financials for it,

Aliexpress is a division of Alibaba Group, which likely makes the bulk of their profits through their B2B sales. They don't provide separate financials for it, or even its approximate size compared to other components of the group. My bet is Aliexpress has slightly negative margins up to -5%, and makes up to maybe 10% of total revenue. In other words, it could operate like this forever, being subsidized by more profitable components. It could also be slightly profitable, I'm not sure.