STAY AWAY FROM ANY KIND OF PBN.
The sky isn't falling.
PBNs have always carried a risk, and with that risk is an obvious reward.
It really comes down to 2 things here:
1) you don't want to take the risk
2) you're willing to take the risk
Google has always hated PBNs, they are always trying to knock them down, but in reality as long as Google uses backlinks as a factor PBNs will work.
I lost 0 of my PBNs. Why? Because my network is not built exclusively for links. I built a network and will continue to build up my network of sites that are designed to make money, the link sales are only a part of that total plan.
How many PBNs have you seen that also are built to gather emails for a mailing list, and actually use that email list?
How many PBNs have you seen that also have affiliate ads, sell tshirts, offer ebooks, do product/service reviews, everything real sites do?
Now, all money made from my network is entirely used to build that network up. This isn't a link network, so much as a network that also offers links.
The biggest difference is, I also use my network, I have built it up to support my own sites, which is where my ROI comes from, it pays for itself, so it is self supporting.
Sure I'm not running a network of 1,000s of sites, but my network is growing into the 100s. I accept the risk, and have done everything to mitigate the risk.
I do agree, stop buying cheap PBN links and thinking they will last forever and carry no risk. But don't assume that Google can target all PBNs, as they still love links.
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Do NOT contact me asking to buy into my PBN, I do not currently sell on BHW**