Just wondering about this. I primarily build small sites (1 to 10 pages with low-medium comp keywords) and use pbns and web 2.0s exclusively.
Do you feel pbn relevance -- ie; buying a site that was previously about fitness, and then linking to your diet pills site is more "safe" than buying an expired domain that was previously about, say, art galleries, and linking that to your diet pills site? Or do you feel that either way they are out to get smacked?
Because you say you are not using expired domains at all anymore. And if someone was to tell me that in a year majority of pbns are going to get hit -- relevant or not -- I would probably milk the irrelevancy factor that doesnt seem to matter at the moment. However, instead I am trying to find only pbns that are relevant to my niche sites, thinking I am safer, but which of course is eating into my profits by taking a lot longer to do.
It's not cut and dry, and nobody really knows the answer. Like ... questions:
Are links to an expired domain discounted 100% of the time? Are they entirely discounted, or partially discounted? Are they discounted only if the topic changes? Are they re-counted if the domain goes a year or two with the original sources still linking? Does Google merely apply a more strict filter in validating the links ... i.e. if all other factors look good, perhaps the links are validated, but if other things look fishy (like it has a footprint of being a PBN site) then the old links aren't valid? Is it a matter of Google intending to always invalidate links to expired domains, but it doesn't always execute that plan very well? Will the links be valid if the website continues to pick up more valid links in the same niche? Are expired domains good for money sites, but not PBN sites?
I don't know the answers to all these questions, but I do know that a PBN made up of expired domains can go boom. Is the expired domains part of it a vital aspect, or would a regular network have been fried under the same conditions?
I'm not going to say PBN's don't work. I've seen them work really well. I've seen them not work well. I've seen them get deindexed. I believe I'm competent enough today to put together another PBN and make it work just fine ... but it would be an enormous amount of investment, work and risk.
I have domains set aside for a new PBN. If I had to do it over again:
I would use relevant expired domains -- those are harder to find than you might think. rayforgovernor2008.com isn't going to do much for you, even if it's DA60 and TF30.
In fact, I'm going to make an entire new post about this, one sec. Writing a new article, will post the link here: http://www.blackhatworld.com/blackhat-seo/black-hat-seo/767279-quick-dirty-relevant-expired-domains-pbn.html
I'm not saying I'm not using expired domains anymore. I'm saying I can't recommend doing it because I was fried in the past, and I'm continuing to experiment with it on a smaller scale -- by being more diverse in hosting etc. I hope for great results, but its not something I'd promote as being effective at the moment. Also, knowing it's Google's intention to disable this method since 8+ years ago, I'm inclined to not want to put all my eggs in this basket.