It is important to note that creating a new design takes time. Hours, days, and sometimes even weeks or months go into planning and creating what we want to be the perfect design for our customers. Each designer and digitizer has a different technique. While some designs may look exactly the same at first glance, even the same basic design will always have differences with regard to stitch placement, stitch length, technique, steps, and number of colors and shading. If one designer lists a design on Monday and another designer lists one on Tuesday, I can assure you that the second one did not sit down and instantly copy them. They were already working on something and the timing is simply a coincidence.
Second to the fact that it takes a lot of time to digitize and then test out each design (often more than one person is testing the same design), many designers may purchase clip art that is non-exclusive and can be purchased and used by MANY people for a variety of reasons (to create printables, use in blog posts and on social media, create embroidery and sublimation designs). What this ultimately means is that several embroidery designers and digitizers will end up creating the “same” or “similar” designs over time. Often you will not even realize it if you aren’t following other shops, and new ones pop up everyday! As shop owners who create and sell embroidery designs (printables and sublimation/vinyl files, as well) we cannot know about every single other designer across the globe.