In a general sense, open source theft is bad, obviously. I have trouble feeling bad for this specific case though, given that it is a tool for cheating in interviews and tests.
A GPL violation is a GPL violation.
I made an OSS tool to help you cheat on your taxes, screw your business partner, or ensure your ex wife cannot see the children. Someone stole the source and is backed by a major VC firm. Is the thought different at all or exactly the same? Just raising the question.