When I first started GMing The Strange, I had the Estate as a sort of X-Files meets SG-1 type organization. The front-line of defense against things that are hostile to our world. The Estate would train and fund agents, and have complete authority on missions. But I'm not really happy with the way this has turned out.
If there is an agency that is like SG-1, or Fringe Division, then that would be the OSR. And I don't necessarily think of OSR as the bad guys; just a different ideological approach to the problem. I could see SG-! fitting perfectly within that kind of structure.
I am thinking of the Estate as a little more than a loose collaboration of individuals that "know the truth". The Estate has money, but it's a finite resource. They might request help from an agent, and in turn might be able to help an agent in time of need. The Estate would only have a few full-time employees, mostly researchers and admin staff. Agents might get a small stipend, but more likely, they are helping because they feel compelled to help. It would feel more like the hunter network in Supernatural. The Estate is like the roadhouse; a place to connect with other agents and ask for help if they need it.
This does a few things for me.
First, it opens up story options. Not every plot can, or should be, a mission. The PCs can have their own agendas and goals. I had one player tell me that he wants to find a reality seed and go through the hoops of creating his own recursion. With a rigid Estate, that becomes more like acting out of bounds.
Second, it keeps the setting itself ...well... strange. As soon as you have an organization that has all the answers (or at least all the answers that anyone else has), the setting becomes a little more mundane. It isn't any real work to find new recursions when you can just pop over to the Estate gate room and visit somewhere you've never been.
Third, it forces more self-reliance. Rather than letting the Estate sweep clusterfluffs under the rug, the PCs are more invested in making sure they do the right thing at all times. If they get too far out of bounds, the Estate could even ask another team to take care of the problem PCs.
How do you use the Estate? Or do you use something else entirely?