The "medieval multiplayer" genre is saturated because the standard is pretty low and while there are good games, there aren't outstanding ones in the way it's happened with other multiplayer genres.
As for MP being more expensive to maintain, it's quite relative. It might be true that Warband's multiplayer costs more money than it gives back (although I wouldn't know) but there could be options for monetisation that are beneficial in the long run (I'd say that cRPG, PW and Mercenaries have made interesting forays in this direction).
All in all what I wanted to say is that the "More people play SP therefore TW should ditch MP" or the inverse are futile since it's a product of the game's design and not the playerbase's decision. It's purposefully disingenuous to think that TW would forfeit either side of the market when they are in a good position to exploit both.
As for MP being more expensive to maintain, it's quite relative. It might be true that Warband's multiplayer costs more money than it gives back (although I wouldn't know) but there could be options for monetisation that are beneficial in the long run (I'd say that cRPG, PW and Mercenaries have made interesting forays in this direction).
All in all what I wanted to say is that the "More people play SP therefore TW should ditch MP" or the inverse are futile since it's a product of the game's design and not the playerbase's decision. It's purposefully disingenuous to think that TW would forfeit either side of the market when they are in a good position to exploit both.