This is a bit of a gray area in Search engine marketing: Google’s Search Central documentation states that “​​any links supposed to govern PageRank or possibly a web site’s ranking in Google search results might be considered Element of a link plan and also a violation of Google's Webmaster Recommendations. https://www.seoclerk.com/private-blog-networks/1025533/POWERFULL-PBN-1000-Web2-0-300-Directory-500-Wiki-500-Forum-Profile