So those of you who make purchase decisions for software used in-house... what are your turn-ons and turn-offs? If I'm trying to sell you a product that you find technically useful and exciting, how does pricing play into it? What would drive you away from a buy decision on an otherwise great product?
Say your software is licensed at $10 per person using it per year. In addition to the $10, I need to consider the costs of installation, configuration, first level support, entitlement/license management, and what it will cost me to extract the data and munge it into a usable form when we decide in three years that your competitor does it better.
Now consider that most companies offer lousy support for their products, so I also have to do a test roll-out to a small number of people, manage that, and figure out if it will all be worthwhile.
If you discount based on quantity, can I roll the test group into the main group? If you price in chunks larger than per-user, do I fall between your levels in some disadvantageous way?
Is it any wonder that I vastly prefer standard-protocol based, open-source applications with healthy user communities? No, it is not.