The posts in question were indeed deleted by the moderators. This was later confirmed by morvillz7z:
^^

OMG, That's interesting. Have you ever seen this kind of generosity from the Mods before?
Banning users for Plagiarism is too rare on the internet. But Bitcointalk Forum took it seriously. The rules are too strict here. I don't blame moderators for the strict restrictions. I would blame the community because the members go after others and hardly need to ban others. Now, If moderators can give someone a free pass, and there are some pending Ban appeals. Why do Moderators not comment on that appeal? At least they can explain why it is a perm ban and cannot be unbanned. This is unfair to those who got a perm ban for the same offense while others are forgiven.