so explain why it is not vanguard marks used to buy from FACTION vendors rather than crucible marks? (the crucible vendor i completely understand and see your point on though) Element damage is pointless in PvP so why sell elemental weapons and not weapons with PvP mods\buffs from the crucible vendor only? IMO Faction vendors should accept both sets of marks, vanguard accepts vanguard and crucible accepts crucible marks - i honestly cant see how bungie got it that wrong!