PBNs are perfectly fine and I can assure you, there are no indexation issues. What is the problem is, that you are building crappy PBNs and you get hit way too easily. You've been cutting corners and the result is, you got banged. That's all there is to that. And regarding indexation issues, those are due to the fact that you are using spammy domains with terrible history. Clean domains get indexed in no time without any help at all. Adapt. And feel free to read this, that will help you to get some grasp on current events - https://www.blackhatworld.com/seo/c...osts-metrics-spam-and-niche-relevancy.916518/
Obviously you would say this BECAUSE YOU ARE SELLING PBN DOMAINS! In truth you cannot make such a large claim "pbns still work no matter what and if they dont for you its because you are doing it wrong!" well no not really, my foot print is ZERO. Unique IPs on proper hosting sites. Varied whois privacy, varied registrant information, varying registration times for domains, dripfed content, unique site designs, my PBNS are damned well realistic and I got hit by this penalty too (though to a smaller degree than what others are saying) its was notable in the serps trackers I use. And therefore, there IS something fishy going on im certain