I definitely think that's a case of throwing crappy over-priced offers onto the wall and seeing what sticks. Just like crappy blog-spam, you never know when some fluke of the search algorithm will redirect some poor unknowing fool to your page or product and they are desperate or uninformed enough to buy whatever it is you are selling.

100% the fault of Amazon or whatever marketplace this is. Right now we should be having a rich taxonomy and unique product database that links all versions of the same product together so that I can click: "Chewy Dog Food 5kg" and get all the sellers offering it. Then proceed to sort by price, filter out the suppliers that look dodgy, add said suppliers to a "fake chinese product spam list" personal black list, and proceed to buy the cheapest original version of the product.