Bad Idea #1: Site Licenses.

The opposite of segmentation, really. I have certain competitors that do this:
they charge small customers per-user but then there's a "unlimited" license at
a fixed price. This is nutty, because you're giving the biggest price break
precisely to the largest customers, the ones who would be willing to pay you
the most money. Do you really want IBM to buy your software for their 400,000
employees and pay you $2000? Hmm?

As soon as you have an "unlimited" price, you are instantly giving a gigantic
gift of consumer surplus to the least price-sensitive customers who should have
been the cash cows of your business.

Joel Spolsky
"Camels and Rubber Duckies" (on the Pricing of Software)