You used to (still do?) spam this heavily on the programming subreddit. It annoys me to see that it's selling rather well, yet you apparently can't be bothered to buy an ad.
Nearly every submission you've ever made to reddit is either directly to your book, or to a post on your blog, most of which include a massive ad at the bottom for your book. That's spam. Even if there was no ad on your blog and you receive no compensation in any way, it's still spam.
Please see: https://www.reddit.com/wiki/faq#wiki_what_constitutes_spam.3...