I would think it probable. Speculating here, but if Versus is supposed to allow for competitive play there needs to be some way to host “offline”, i.e. I see it as reasonable that Versus gets dedicated servers and then the base game should get it as well.
Rented server instances are often quite expensive, and I would not be surprised if it is much cheaper for Fatshark to host their own servers. In my personal professional experience the breakpoint is already somewhere around 20 machines, i.e. if you need the equivalent of more than 20 machines per site do it yourself (or well, you buy the hardware even if a third party does the on-site support half-way around the globe), if you need less rent the CPU-power needed.
Also speculating here, but I think they might have had issues with another platform (lets say they want the server containerized, that often means LXC / Linux support) and modifications (since some modifications are not “client only”).