The truth is, Google are looking to wipe out ALL content from the SERPs if it has been “engineered” to rank well by optimizing the content for a specific phrase or two. When you read this type of web content, you can easily spot phrases that seem a little out of place, or forced, or repeated several times throughout the article. Using a keyword phrase 3 to 5 times every 100 words within an article is just not natural. It use to be that Google wanted these “hints” to tell it what a page was about, but today, they’ll penalize your page (and site) for doing it.