http://BluSEO.net What are the diadvantages of SEO hosting which is oftentimes confused with PBN hosting. For starters your sites are hosted on one server with only C class IPs so there is not much uniqueness there right off the bat.
Next serious problem is the fact that all the sites hosted on these IPs are strictly private blog network sites. There are no real business websites on these IPs so it becomes much easier for the search engines to penalize one IP and so deindex each and every site on that IP.
Go to my post on LinkedIn to read more: https://www.linkedin.com/pulse/5-reasons-avoid-seo-hosting-martin-hosner-international-seo-expert