The sales tactics on that page are also used by people trying to scam you into buying their product. It's almost like "it's too good to be true" -- but no, it's true and the book is quality. Buy it, you won't regret it.
Marc-André Cournoyer, the author of the book, also writes about his sales tactics if you're interested -- you should go buy that book too.
Who are these alleged people, where have you met them, how do you know they're scammers, and more importantly, have you ever met one doing this alleged scamming with programming books?
"Offering a full refund is something scammers do. Then they give you your money back. Run away!"
If you are so afraid of being scammed that you think a refund offer makes something suspicious, it's probably a good time to evaluate your buying habits…
The page just makes it sound too good to be true and that makes some people skeptical.
Logic. I like to see it on HN. It is missing from this conversation.
That's the hilarious part about this. I get similar comments from time to time, even with my free programming newsletters ("oh, you're tracking links, that's really scummy!" etc) and I think.. if I really wanted to scam people and make tons of money, I'd pick a much more gullible and grossly larger market than programmers! ;-P