Those that leak things repeatedly get cut off. They can cut off places access to media kits, and if you are a review site, that's not something you want to happen.

My lord man, if I was under NDA I would button it. It wouldn't be "It didn't happen", there would be no "It"...as in "What never happened?". If if asked the answer would be "Huh?". hehe

Also, NDA means that info is confidential prprietary info, and while places leak it, they could get into trouble with the law. I doubt they'd go that far unless it was a serious breach of something though, but they *could*. An NDA is a binding legal agreement. It's not just that, it's just that when you sign one, you give your word.