It works something like this;
1. Somebody uploads a design they found (probably stole) and creates a piece of clothing
2. Somebody else with just a shred of desire clicks on a couple of buttons and pays $3.78
3. A Chinese sweat shop worker immediately picks up the order and creates the piece of clothing and gets paid $0.03 for the trouble (whilst working 18 hour days in leui of any breaks, weekends or holiday)
4. The clothes get air shipped across the world and delivered to the customer, skipping customs and taxes
5. The customer, who basically forgot they bought the clothes (it was after all purchased in a tiktok haze and didn't affect them much financially) trys on the item, takes a photo, and throws it in the closet
6. A year later it gets donated to charity, who assesses the quality and redirects it to landfill
(most of my information here has come from a documentary, "Inside the Shein Machine)