Applies to items which don't even claim to be open source and should as such be handled like industry items/vitamins.
This design doesn't even claim to be Open Source and also comes with no sources, so you can't make a copy or learn from it without re-engineering. RepRap recommends to prefer open source designs, which come with sources at least sufficient to make a copy. Open source enhances freedom and is also the foundation which made RepRap so awesome.
If you want to help improving this design, please ask the designer/vendor to release it under an open source or open hardware license and also to upload such sources to this wiki or to link to the repository containing them. If he did, remove this message. For intermediate/partial cases, there's also Template: NotOpenSource.