No! A PBN, or Professional Blogging Network, is a black-hat method of basically cheating at SEO by creating a network of dozens or 100s of sites and linking every one to each other to artificially boost their link profile. It is also a great way to get penalized by Google.
Since we are adding both new blogs and new clients every month and NOT linking all of them to each other, this process does not at all approximate how a PBN works. We only conduct white-hat SEO campaigns for our clients and have for over 14 years.