Since the game has apparently moved to more 1v1v1v1 kind of model, theoretically throwing in another smaller organization of players wouldn't be too difficult, particularly if it was a faction that could throw support behind whoever it wanted or pledged its loyalty to the highest bigger.Several people have mentioned this, or things like this, and it comes down to the fact that if there is a choice to be made at a group level, leadership and politics WILL happen. If you're not in a city, you shouldn't get the group benefits of a guild; on the other hand, what benefits could we give rogues as an ALTERNATIVE to make up for what they lack? I think there are probably some creative and thematic options out there that aren't just copied from cities. I'm not referencing ylem benefits here because I think @Damonicus 's suggestion of a quest line to buy into a (perhaps more limited) supply of ylem-based wares in Delve is a great idea.
Selling an artifact to combat something that shouldn't exist in the first place is just balls.