[throwawaypolicy]

Anti boycott laws are a real thing, you can read about them here https://www.bis.doc.gov/index.php/enforcement/oac

I don't pretend to know whether restricting country of residence counts as discriminating on any of race, national origin, or nationality... but at least at first glance it seems very plausible.

Edit: And according to her linkedin she is a lawyer licensed to practice in (at least) Minnesota, i.e. she is (was) part of "legal".

[jacquesm]

That seems to mostly focus on declarations of being non-Jewish which is a thing in some countries and the enforcing of a boycott against Israel.

Technically it could be made to apply to employing people in Russia or China but such restrictions are found with some regularity, if they are problematic that does not just affect GitLab but also lots of other companies.