Time and time you see models on GrabCAD that originate from other web sites. Some of them are found on the 'Popular this month'-section and thus 'promoted' by GrabCAD, even though they contain links to another site from where they have been downloaded.
But, according to the Community Guidelines, it is illegal to upload models that are not your own work, at least without changing them. So, could someone from GrabCAD please clarify if the rules have changed, or if they are not being enforced, and if so, what are the reason for this?