Guys, we finally figured it out.

On Xianyu, those selling virtual goods and making millions per year—most of their supply isn’t sourced by themselves. It’s through this kind of “coupon marketplace.”
In plain terms, it’s just three things:
Search keywords, real-time price comparison across multiple platforms, and directly filter the lowest price.
For movies, audio, dining, paid knowledge, and lifestyle services, there are over a thousand types of digital entitlements.
They can also connect to an API for automated top-ups—instant delivery within 24 hours. It’s like the goods are still being sent while you’re asleep.
With this kind of first-hand virtual inventory, if you know about it, you really are picking up money quietly.
Website:
Damn, the information gap—this thing really isn’t a joke.