The permanent ban is applied to those who post a plagiarized content or share a link to a malware or a phasing website.
If I'm not wrong, spammers are usually warned with a temporary ban before they get banned permanently.
Delight Media got caught plagiarising from an article, so I am also curious why wasn't he banned for plagiarism. do the staff consider not permabanning if the accused of plagiarising a content deleted the post before they got to see it?