Either Mason or someone on his team is a complete douchebag. I certainly don't need him to teach me to not give a fuck. I already know how to do that quite well on my own. :)

As an author myself, I often give away free copies of my books to encourage reviews, especially when the book is new. That is a common pre-release or shortly post-release technique in publishing. And, any review is generally considered a good review, whether it's good or bad, because both generate publicity, get people's eyes on the book, and increase the likelihood of sales.

Anyone who wouldn't want you reviewing your book is obviously a person who doesn't understand book marketing.