I fail to see why a demo user would want to run a Cruise server.
From what I've seen, you would need to place barriers, signs, and lines at the very least to make a 2 way road system on Blackwood, which you can't do as a demo user.
So why do you want such a system?
And why, considering the huge amount of work and effort that goes into producing a working cruise system, should anyone give it away for free? Especially to demo users who contribute nothing in the way of income for the game developers, who licenced users rely on to keep - at the very, very least - the master server and this forum going.