There is often the requirement that a significant amount of users have to create occasionally a Purchase Order. That's all they have to do in Business Central. Currently, they would require a Full User license. Given that they are only occasional users, they would fit best as Team Members. As a Team Member, you can create a Purchase Quote and not a Purchase Order.

Workarounds are in place by either implementing a separate purchase/procurement system or converting quotes to orders etc.

Instead of selling more full users, we see the opposite of selling no or fewer licenses due to work around. More licenses could be sold if creating Purchase Orders would be part of the Team Member license.