@zapta I agree on the OSHW side of things, mainly because Duet3D's website makes a big deal about being open source hardware, software, and an open community.
You can't have it both ways, either your hardware is opensource, and design files are released, or it's closed source, and they are not - but perhaps a schematic is provided for assisting with software dev.
For my project, I only need the schematic so my needs are covered, but I don't see that as falling under open source hardware.
Withholding the hardware design for whatever reason isn't in good faith for open source goals and claims. If the source is withheld, then the open source claim is just marketing fluff for people who think open source is good and want to support open source projects, even if they have no intention of using the source.
If you want sole distributorship/manufacturing rights (for whatever reason) and to not have anyone else sell your design or remixes thereof, don't release it as open source, or instead use a restrictive open license. Alternatively, make older versions open source, with the newest version proprietary commercial, but don't claim to be open source if you don't release the source files (which is the very definition of closed source.)
This is why I originally questioned whether the project was still open source.