@Timmy, I pointed out they do not want IMG to be against them. We aren't talking about poor half-wit miners, but about a very powerful and independant non-house organization, which can fight pretty well in asteroid field (remember Rheinland Military and GMG?), not to mention they are able to poke their Crayterian and Libertonian friends. As I stated before, they need proxies, as Gallic resources are slowly no more.
It takes time and resources to train qualified miners, so the Crown doesn't really want to bother with IMG. Add up the fact that's Sirian tech and it would take some time to make station operational for Gallic miners and engineers.