Thank you so much for your investigations. I am not sure if it is the reason for ban or not (only the Mod who banned me knows exactly).
If that is true, I think Bitcointalk may be the most strict forum in the world that users can get banned immediately and permanently without any Warning & Specific Reason
Plagiarism is a violation of international copyright law and will get you instantly banned on just about any forum in the world. Don't pretend that you didn't know what you did was wrong, or that you didn't know that's why you were banned.