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.

Here's another good informational link that delves into this aspect: https://www.reddit.com/wiki/selfpromotion

I'm glad you've bought ads (though I don't remember ever seeing one), but that doesn't exempt you from the rules about self promotion.