Just my 2 cents here, but Google is aggressively rooting out people who are link building for ranking. They have specifically said that participating in link schemes will earn you a penalty. This is not ambiguous.
Tf you participate in linking schemes, you can kill your sites.
Sending links to tier 2 and 3 links IS a linking scheme.
When the Blog networks started, everyone jumped on board, Google took notice, pulled out the gut hook, and eviscerated thousands of sites.
What are you going to do if they do the same to people with unnatural tier 2 or 3 links?
I know that no one is concerned about this and I have even been told I am talking out of my ass on this very forum for expressing this opinion.
Google is a business, and they don't like it when people scam their customers.
Google has said they are GOING to, not trying to, level the field for websites that do not know SEO, penalizing those who over optimize their site.
In my OPINION, any kind of blog network, link pyramids, and tier 2 -3 level linking campaigns will eventually get you penalized, when Google takes care of the blatant offenders and gets around to mopping up. All google has to do is look at the number of upstream links pointing to your site that have link juice being poured in by spamy sites. (No one is building quality into these links, they are spamming.) When your site has enough of these types of links pointing to your site to be a statistical anomaly, it stands out. It is a very simple algo change to flag these sites for manual review.
Do you seriously think that Google just hasn't thought of it yet , or does not know it is going on, or does not know that the SERPs are being affected??
This is my opinion because these types of links are not natural, and normal, and Google has said that they re going to root them out.
I may be completely wrong here, but where can Google take action to stop link juicing if not at the upstream linking diversity?
They have slapped everyone who has done linking directly to their site, and it was not enough in their eyes. So how will they level out the playing field?
In my opinion, by devaluing upstream links, and devaluing the power of EMD (which has already been started).
I am not sabotaging any of my sites that make me money, and in my OPINION, these linking schemes are soon to be targeted.
I remember people saying that Google could never de-index all the article directories, then the same was said of blog networks. The are all gone or ghosts of their former self.
Google can and will do anything it wants as far as protecting their product, and when any kind of link building starts affecting the SERPS they have historically devalued these links. Flooding tier 2 and 3 links IS affecting the SERPS, as anyone will vouch for.
It may not be long before those "unnatural link building" messages have nothing to do with a link that actually points to your site. NO matter the form, building a link scheme of any kind is a placing a land mine for your site to run over in the future.
Has anyone gotten this notice on a site they were careful not to link directly to? One that absolutely makes no sense?