Because retailers do the evaluation for you. We just bought a bunch of scissors and snippers. One of them sells well and some of them look OK and might wind up

Because retailers do the evaluation for you. We just bought a bunch of scissors and snippers. One of them sells well and some of them look OK and might wind up selling. One packet from a factory came with each product individually wrapped in aluminum foil like a child did it (and probably did) and each product was still coated in a sheen of gross machine grease. That was the worst out of a round of Alibaba buying of maybe 20 SKUs. There's also a big world out there and the discount that comes from buying products of poor quality is more appealing than the quality itself. There are, in fact, many ways to make a bikini.