So, another way of looking at it is the app store/app upgrades way. You pay using smaller increments, but have a view of the goods that you are buying. So instead of a future commitment, its more about paying for what you want now.
If its seamless, then micro transactions work. It also implies you are distracted enough not to do a future projection of the longer term aggregate costs incurred :).
If its seamless, then micro transactions work. It also implies you are distracted enough not to do a future projection of the longer term aggregate costs incurred :).