I may have had different allegiances, but no more! I have seen the true path.
When Bungie sends you a free shirt (from winning a mail sack because Bungie is awesome and gives free stuff!), and it is a faction shirt, you have been told by the Bungie overlords to whom you belong.
New Monarchy for life. All hail the new order.
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It's because Dead Orbit is so overwhelmingly awesome, that Bungie has to make sure the other factions get a chance. But it's awesome that they sent you a free shirt.