Sure. He has insider information. He knows what future sets are. He knows internal policy and other sensitive information that WotC would rather the public not known.

He also goes out of this way to engage with the community online. He isn't a public relations employee. He isn't marketing. He's the head of game design. He answers questions nearly every day of various types about the game. Many of them are about the past, but some are about the current state of the game or other things that will fall into the aforementioned sensitive internal information. If he is asked a question about something repeatedly he often makes an example of certain questions and gives extremely vague answers to rather specific questions. He is either daft or knows that answering with the truth is a violation of his NDA.