Using a central license server can be used to license the number of concurrent users. I've installed software on thousands of computers as part of a base image

Using a central license server can be used to license the number of concurrent users. I've installed software on thousands of computers as part of a base image that only had 25 concurrent licenses paid for. The usage pattern meant that we rarely exceeded the number of concurrent license, but the software was widely used enough that it made sense to deploy everywhere. In the end we also asked for the limitation to be removed because of several issues (eg; the check out process for off-network usage was cumbersome and locked up licenses for too long, the license server wasn't great at releasing license and we'd frequently have to manual release them). After monitoring our usage over a period of time the software company agreed that removing the license server was the best option to address the issues. I have no knowledge of this case, but this is one scenario where the number of licenses would be so much lower than the number of installs.