I know who I fight for. I fight for my Clan. And for My Clan Leader. He fights for dead orbit and that's enough reason for me to fight for them. Tis true that DO accepted Crucible Marks however to be out there scouting on the front lines you need skill. And that skill is best shown through combat amongst peers. The Cult is about war so it comes as no surprise they would wish for guardians to prove themselves in the Crucible however for what reason would a Monarchy gaurdian have for fighting others? No solution comes to mind. It would seem more like "spreading our name" is an excuse. If you truly helped the City wouldn't many know of you already?