I agree

But anyhow, what about sections labeled such as 'link exchange' or 'your link here' without any really mentioning about paying service? Does that get penalized?

hey thanks a lot it was a very interesting post..! hope to get more on the forums

What are the common methods of link building people use..!?

I've heard that google has penalized some sites for using paid links -- still these links are constructed manually only and not using a script or any sort of special code. How is it possible? Or does google do it manually? Or someone cynical reports it to google?