There's your problem. I'm not sure what works, but scammy SEO "experts" and Facebook definitely don't. Try word of mouth. Get a presence on more social media. Comment on blogs. Keep a blog. Post on other forums. Talk to people (that's what marketers call "engagement"). Don't just try to sell.
Also, if you have trouble selling your creations, how come they include a book that among other things claims to teach, I quote, "getting profits from your games"? You're sending mixed signals. :)