i think the scam here is that amazon or amazon sellers will pay people to warehouse product in the US, because when you're selling aliexpress goods at a 90% markup, you can afford the warehousing. and the people they're paying to run those warehouses list the product on ebay at 20% markup, on the assumption that if it sells they can make an aliexpress order and restock before the amazon seller notices their product is missing.
The margins look huge, but actually many steps like carrying that inventory or even the shipping from near warehouse is pretty expensive. Like more than the product itself.
Reverse image search works wonders against "unique" brandnames.