Content being free does not give someone a right to use it as they are authors of it and/or monetise on it.
The user has been evidently misleading by saying that everything written here was original and with no re-writing.
If there were no intentional misleading, maybe we would have taken a different action.
Internet plagiarists often think that they can freely plagiarise because they will face no real-life consequences for their actions. They consider the virtual world as a joke that they can exploit.
If you committed such plagiarism (like the one above) when writing an essay or dissertation and any legit University, you would be suspended and possibly face legal consequences.

EDIT:

I have just gone to check on some random post and, right away, I found plagiarism there too.
It seems that this user has been scamming with content theft since the beginning.
@windgirl/the-four-qs

I see that you also have a history of scamming with plagiarism:
@malopie/history-after-all