The primary driver for adopting a license-exclusive service desk is financial optics. When an organization purchases a comprehensive suite, the service desk module is often marketed as "zero marginal cost." CFOs and procurement teams champion this as a win.
The key is to map out your before you buy. If you know exactly who needs the "power" tools and who just needs to "view" the work, you can navigate these licensing models without overspending. service desk licence exclusive