All the major search engines actively discourage artificial link-building campaigns. To get a sense of why these campaigns are discouraged, you need to know a little about how they work…
Back-link building systems generally use low quality or “spun” content (many articles combined together in different ways) that is designed to appeal to search engines, not necessarily human beings. This replicated content contains back-links to your site, helping build it’s search ranking.
Search engines discourage this link building, probably for 2 reasons…
1. It produces poor quality, keyword-stuffed content that no human being would ever want to read wants to read. To combat this kind of content, search engine algorhythms are becoming smarter at recognising and downplaying back-links from this low-quality content. Read about Google’s Penguin Update if you want more info.
2. The search engines would really rather you used Pay-Per-Click (their bread and butter income) if you want to increase your search engine rankings
OK, if search engines don’t want you to use artificial link building, are there any consequences for going against their recommendations? Maybe. There has been an unconfirmed rumour going around in Search Engine Optimisation (SEO) circles for nearly ten years, that Google can penalize your site for artificial link building. It’s called sandboxing and most SEO experts agree that it exists, though it’s never been confirmed by Google. The general concensus seems to be that it mainly effects new websites and the sandbox period seems to be around 6 months.
Here’s where it gets interesting though… Google cannot seriously or permanently penalize a website for having poor quality back-links because ANYBODY can create back-links to any website! If any of the major search engines started banning or down-ranking websites for these practices, companies would be quick to use it against their competitors.
The ongoing risks then, are that you could pay money for link-building, significantly increase your page-rank, then loose that rank at the next Google algorhythm update.