We call it “Private” simply because we offer it ONLY to customers that have created a website/s with us and we maintain them.
We have simply purchased space in SiteGround servers and we sell it for a cheaper price.
Since SG is the best company that we have tried as of this moment, we encourage all our new customers to host their sites with it. A good benefit of hosting with us is that after the first year you will be paying the same price.