[chc]

Asking people for money before you'll give them the product creates market segmentation that does not naturally exist. There's no such thing as a "natural" pricing structure. I hope we can agree that, in pricing a product, your goal is to offer a fair exchange of value. Since different customers value things differently (for example, a billion-dollar business stands to gain a lot more from a 1% increase in revenue than I do), tiered pricing suits this goal more naturally than flat pricing.