We can spread the houses out, but its already been said. We can't really add house in at the moment. For the advertisements. I can see someone buying a newspaper, maybe it could show all the advertisements listed in the last 5 hours or something, but the /cellad seems abit useless. Its the same the as /ad, just more money. It wouldn't be used, seeing that some people don't have cellphones and more people can see the /ad.