I think it must really be about the numbers. If a title doesn't sell well, and people don't like it, the LE is a good model for Stern (but not us!). If the title sells well, the Premium is optimum because Stern can make as many as they want and keep the cash rolling.
It all depends on the game. I feel like I could still get an Avatar easy. Its not popular. Three models wouldn't help Stern. Tron on the other hand.........
I don't know though. I am just speculating.