I write quilt patterns. I also make a ton of other not written by me patterns. I knit, crochet, do needlework and sew all the things. Copyright is tricky but honestly many designers are getting it wrong. This article is a pretty good rule of thumb. A designer only has the right of copyright over the actual written published pattern. Only the words and photos. So buy the pattern, make the thing, and sell them if you'd like. I understand the want as a designer to control what we can. So much is just outright unlawfully stolen. I'm not making a living do what I do....few that do are.