It looks like the ban was a good decision, because it looks like a copy paste with word spinners.
We later found out that he changed some words truly but I guess moderators would have checked some other of his posts to know if he has been doing something like that or not. If they do, they did not see other similar plagiarism would be the reason for the removal of the ban on his account.
If we should guess of him of something like this, we need more evidence that he has done the same or something similar on other of his posts.