But I don't just have my own innate cynicism to go on here! The framedeck project write-up actually contains this disclosure:
As they were preparing this documentation release, they emailed me to see if I'd be interested in a collaboration of sorts. They would provide one of their laptops and some additional modules for me to build something unique with the only condition being that I released the designs for public use.
Which is fine! This is earned media - Framework got some people to make and open source some cool designs. I wasn't sure, last week, why they were doing that now in particular. Now I know why they're pushing that angle, and it makes sense.
And maybe that's because they're bringing the new version to market so they're expecting to have some excess stock of the original motherboard that they need to sell down.