Maybe his sales aren't so big?

He's constantly giving away his books. One theory is that he makes much more from "consulting" and political work around Silicon Valley. So the books are just loss leaders.

More reason to support his work.

Every time I bought something direct from his website, I got a quick thank you email. I think that's what is meant - not that he writes to you if you buy it in the bookstore.

I am not sure what they're referring to with that post. The kickstarter sells a personalized signed copy of this boom at about twice the price.