[damoncali]

The problem you're having is that you're equating usage/features with value. They're not the same, or even correlated as much as you'd think. Precisely the same software can be an order of magnitude (or several!) more valuable to one customer than it is to another. You can't always use features and usage as a means by which to price discriminate, because sometimes there is literally no difference to go off of.

I run a bug tracker with one plan- $20/month. I have customers who are stretching to pay the $20 a month, and others who would easily have paid $200. Yet there is no way to tell one from another by looking at how they use the product. It's kind of frustrating. I am giving up 9 customer's worth of value because I can't figure out how to charge one of them more than $20 per month. (Actually, I can, but my billing code isn't finished yet).