These files are licenced under Attribution-Noncommercial-ShareAlike.
You’re free to:
Share - copy and redistribute the material in any medium or format
Adapt - remix, transform, and build upon the material.
Under the flowing terms:
Attribution - you must give appropriate credit, provide a link to the licence and indicate if any changes were made.
Non-commercial - you must not use the material for commercial purposes. (a commercial purpose is one primarily intended for commercial advantage or monetary compensation)
ShareAlike - if you remix, transform or build upon the material, you must distribute your contributions under the same license as the original.
Your primary goal here is to gain financially from your efforts and so you’re breaking the terms of the licence.
How does that differ from an individual sending the file to shapeways and having it printed for themselves? Shapeways makes a profit on the file, are they not in violation of the licence as well?
No. Shapeways is in intermediate process step for the end goal of that individual attaining the printed version of the file. If the individual then turned around and sold that printed copy for more than they paid shapeways for their printing service, they are the one breaking the terms of the licence.