Would it be correct to assume that awnshies such as the Spider do not follow the normal domain turn rules?

I say this because the map appears to confine the Spider to a single forest province. Even if we assume that this counts as "elven", so that the source rating can be maximised, and if we further assume that the Spider has some holdings outside this province, it is still difficult to see how the standard rules would give the Spider the sort of GB and Regency to constitute a major threat. As far as I am aware, it is supposed to be virtually suicide to invade an awnshie's territory. Granted the Spider probably has access to the gamut of Realm spells (and isn't afraid to use them), but even that requires a significant income to power.

The Spider is, of course, merely the extreme example.

Is this correct? Or is the reason that the Spider and the Gorgon aren't constantly swarming through everyone else's territory because they aren't, in fact, that powerful from a military perspective?