Agree if you're going to charge fractions of a dollar, you have to have a change machine.
Sometimes this is about the price of A game. For people who hang out and play, it's about the price of SEVERAL games or more. As a regular player who understands the up front costs, $1.50 for a premium or LE is probably reasonable. But why a 50% price increase instead of 25% (you're forcing quarter use on me either way) A casual player will probably balk at $1.50 because the game may last 2 minutes and because WTF is a premium/LE?