I mean, in what world is a terminal block "open hardware" https://lectronz.com/products/-3-5mm-pluggable-terminal-bloc...
2) Disappointing the software itself isn't open source.
[0] https://lectronz.com/products/drv8825-stepper-motor-stepstic...
https://aaronhall.com/online-retailer-may-use-manufacturers-...
This listing doesn't exactly pass all of the tests, but as a buyer I'm currently not confused.
It's little more than a standard IC on a simple board with a standard pinout.