My problem with the project model is a project could be anything. If someone didn't want to pay for the next tier they'd create less projects or have 1 generic

My problem with the project model is a project could be anything. If someone didn't want to pay for the next tier they'd create less projects or have 1 generic project which is the name of the company and dump everything into it. Which is what I do with the free version of FogBugz for my personal projects. A user will always be a user. One business may need 12 projects while another may only have 1 project everyone is working on. But if both have 30 users they use up the same amount of bandwidth. And as you suggested, it really comes down to how different businesses work. Some companies work faster than others where 1 project may last 2-3 days. Someone in that company would have to be on top of closing that project and the next one. Or do they create a Generic project for the quick ones and a specific project for the more long term ones? Properly utilizing Projects (and milestones for that matter) have always been a challenge for me with the project management applications I've used (Basecamp, FogBugz, etc).