Not saying stealing the files is ok. But looks like this is a way for people with out printers to buy the models. They are selling things they printed. To a person with out a printer they are providing a service. While yes 3d printers are cheap to some poorer families 200-400 dollars is still a significant chunk of change. Sure argue it's just cheaper to buy one but that's not how the world works. On the other hand buying 1 of their prints (if it's the only one you want) buying a printer isn't economical. It a grey area but blasting people with out thinking is just as bad as taking a free design and making people pay for your printers time plastic/resin electricity maintenance while also supporting yourself outside of illegal activities. On second thought blasting people without thinking is worse.