There are lot of Facebook groups now a days promoting (and selling) lot of Amazon Products especially Third Party Seller Products. These Groups make money in two ways. They charge the Third Party Seller to publish their Product on the Facebook Group and also get affiliate commission from Amazon. So be careful when buying products from these Facebook Group links, make sure you are buying a quality product otherwise it will become a junk soon. Check whether the seller is Amazon or Third Party, if it is from Third Party do your own research on the product before you buy.