Backinks as we all know is essential for SEO especially when they are high quality back links (PR4-8).
With these backlinks you boast your domain authority for better ranking on search engines.
Remember, it not just about building quantity backlinks. But quality backlinks. I have done this for many people and holla, their posts have been doing well especially on Google.
Additionally, some backlinks kill you and some also help you. Creating one with good page rank is very important.
In my way, I don't spam and no fear of google seo ban.