I've heard about that. I have trouble believing some of the cases, though. I've bought several of his tutorials, and in those he paints his subjects straight from the beginning and explains everything he does. The thing is, he copies the colors pixel by pixel: Whether you consider that talent, is up to you, but he does it from start to finish. He may have blocked you because he receives many messages where people asks for tips or straight up accuses him of cheating, and he's probably tired of it. It is very suspicious, but make it for what you will.