In the past, I've played games like Magic, Heroclix, and Dicemaster and have found that one thing all of those games have in common is a large amount of common material that one just ends up with after collecting for some time. Now, when I used to run Heroclix events, I always had a number of commons that I could use to demo the game to new players and in some instances I'd even let them keep a couple figures out of my large amount of "throw-away" commons. I could afford to do this because collectible games tend to have so much material that one acquires from trades and opening boosters that is not overly valuable but can be used to attract new gamers.
Back in the day WizKids would even send tournie organizers boxes of commons with one unique (i.e. Rare) figure thrown as a sort of demo prize. WOTC creates mini-decks of Magic card that stores can hand out to demo the game and draw in new players.
This works because the materials themselves are abundant. For example, in Dicemaster the game is based more on the cards than the dice. Common Wolverine uses the same dice as Super Rare Wolverine within a given expansion, so I'm more likely to give away a Wolverine die than a Wolverine card, even though the die is main mechanic of the game. Here in Destiny, the die is the main mechanic of the game, but is also the most rare aspect. It's already well determined that people will have a use for a second Vader die, but will have virtually no use for a second Vader card.
My question here, and maybe I'm just thinking out loud, is how can fans/supporters of the game promote and demo the game in store with product that is more or less expendable? Or will we have to use our own material and just not allow potential new gamers to keep anything? Starter decks seems to be the way to go, but I doubt most of us would let people keep material from a starter still.