Maybe, I'm not sure. Most of the ones which I've reported have just been newbies posting plagiarized content. Doesn't seem they engage after that. Possibly, someone trying out their bot that they will eventually use for bounties. Some of the sources they are using are actually pretty difficult to find.
Which is why I started using a plagiarism checker:
https://edubirdie.com/plagiarism-checkerSomeone had recommended it in another thread in meta and it has been helpful ever since.