Getting low quality backlinks to your website can damage your website rank, and thus business earnings, over time. I do not do any link building, and recommend you do the same.
Recently I’ve been reading a lot of hype about private blog networks and how they can boost the rank of your website very effectively. There are being touted as “legitimate link building”, and an “Penguin proof SEO strategy”.
It’s a load of bullshit.
Using a private blog network is one of the most dangerous things you could do to your business, and it’s going to balloon your budget as well as create a never ending time-suck.