It certainly didn’t take long to spot servers like that on fedidb! I wonder what is causing people to make those? Load testing? Spam farm? Social experiment to see if people will sign up to an empty instance? Trying to setup an automated simulated social network like people joked reddit was where everyone is a bot except for you?
I think the most realistic answer is that they’re test instances either by a tech company that believes they have a path to monetize a fediverse project or by some kind of spam farm, but the lack of any posts is still positively weird
I’d argue that for a small business a static site might be better unless it’s a managed Drupal/WordPress instance. Too much involved in hosting a public-facing website, CMS and database for most small business operators. They just want to set it and forget it at minimal cost to them (including the cost of time)