Google did research that shows having organic rankings and paid ads, boosts your click rate significantly. So, it would be a mistake to stop advertising if you rank well organically. http://www.google.com/think/infographics/organic-impact-on-p...

This is nothing compared to what RapGenius did. This is a low quality, but legit link building tactic.

The author claims the articles are poor quality, but they aren't. The only red flag is commercial keywords as anchor text, which Penguin today does a good job of discounting.